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What categories can books be divided into?
"Chinese Book Classification" is a classification compiled based on scientific classification and combined with the characteristics of books.
It divides subjects into five major categories and 22 categories. The basic sequence is:
Marxist-Leninist-Maoist thought, philosophy, social sciences, natural sciences, and comprehensive books,
Marxism, Leninism, Mao Zedong Thought
A Marxism, Leninism, Mao Zedong Thought
1 Works of Marx and Engels
11 Selections and anthologies
12 single-line works
121 The period of formation of Marxism (-1847)
122 The ups and downs of the revolutionary storm (1848-1863)
p>123 The period of the First International and the Paris Commune (1864-1872)
124 The period of widespread spread of Marxism and the establishment of socialist parties in various countries (1873-June 1889)
125 The Second International Period (July 1889-1895)
13 Collection of letters, diaries, correspondence, conversations
14 Poetry
15 Handwriting
16 Thematic compilation
18 Quotations
2 Lenin's works
21 Selections and anthologies
22 Single lines Writings
23 Collection of letters, diaries, correspondence, conversations
25 Handwriting
26 Collection of special topics
28 Quotes
3 Stalin's writings
31 Anthologies, collections of essays
32 Single works
33 Collections of letters, diaries, correspondence, conversations
35 Handwriting
36 Thematic compilation
38 Quotations
4 Mao Zedong’s writings
41 Selections and anthologies
42 Single lines Books
421 Before the First Civil Revolutionary War (-1924)
422 During the First Civil Revolutionary War (1924-July 1927)
423 The First Civil Revolutionary War Period (August 1927-June 1937)
424 The Anti-Japanese War Period (July 1937-August 1945)
425 The period of the Third Civil Revolutionary War (September 1945-September 1949)
426 The period of socialist revolution and socialist construction
43 Collection of letters, diaries, correspondence, and conversations
44 Poetry
45 Handwriting
46 Thematic Collection
48 Quotations
5 Marx, Engels, Lenin, Collection of works by Stalin and Mao Zedong
56 Thematic collection
58 Quotations
7 The lives and biographies of Marx, Engels, Lenin, Stalin and Mao Zedong
71 Marx
72 Engels
73 Lenin
74 Stalin
75 Mao Zedong
8 Marxism , Leninism, and Mao Zedong Thought
81 Study and research of the works of Marx and Engels
82 Study and research of Lenin’s works
83 Stalin’s works The study and research of Mao Zedong's works
84 The study and research of Mao Zedong's works
85 The study and research of the compilation of works
Philosophy
B Philosophy
0 Philosophical Theory
0-0 Marxist Philosophy (General Introduction
)
1 Basic issues in philosophy
2 Dialectical materialism
21 Theory of materiality
22 Theory of consciousness
23 Epistemology, theory of reflection
24 Materialist dialectics
25 Categories of materialist dialectics
26 Thought methods and working methods
27 Dialectical materialism Application
3 Historical materialism (historical materialism)
8 Philosophical schools and their research
81 Idealism
82 Empirical Theory, Empirio-Criticism (Machism)
83 Voluntarism, Philosophy of Life
84 Neo-Kantian Attention, Neo-Hegelianism
85 New Reality Theory, logical positivism (neopositivism, logical empiricism)
86 Existentialism (survivalism)
87 Pragmatism
88 Neo-Thomism ( Neo-Scholasticism)
89 Other philosophical schools
1 World Philosophy 12 Ancient Philosophy 13 Medieval Philosophy 14 Modern Philosophy 15 Modern Philosophy
17 The spread of Marxist philosophy and development
2 Chinese Philosophy
20 Materialism and Idealism (General Introduction)
22 Pre-Qin Philosophy 221 Zhuzi 222 Confucianism 223 Taoism
224 Mohism 225 Famous Masters 226 Legalism 227 Yin Yang School 228 Strategist School
229 Miscellaneous School
232 Qin and Han Philosophy (General Introduction) (221 BC-220 AD) 233 Philosophy of the Qin Dynasty (221-207 BC)
234 Philosophy of the Han Dynasty (206 BC-220 AD) 235 Philosophy of the Three Kingdoms, Jin, and Southern and Northern Dynasties (220-589) 241 Philosophy of the Sui, Tang, and Five Dynasties (581-960)
244 Philosophy of the Song and Yuan Dynasties (960-1368) 248 Philosophy of the Ming Dynasty (1368-1644) 249 Philosophy of the Qing Dynasty (1644-1840)
25 Modern Philosophy (1840-1918) 26 Modern Philosophy (1919-)
27 The Spread and Development of Marxist Philosophy in China
3 Asian Philosophy
302 Ancient Philosophy (Asia) 303 Medieval Philosophy (Asia) 304 Modern Philosophy (Asia)
305 Modern Philosophy (Asia) 307 The Spread and Development of Marxist Philosophy in Asia
31 East Asian Philosophy 33 Southeast Asian Philosophy (1)
34 Southeast Asian Philosophy (2) 35 South Asian Philosophy
36 Central Asian Philosophy 37 West Asian Philosophy (1) 38 West Asian Philosophy (2)
4 African Philosophy
402 Ancient Philosophy (Africa) 403 Medieval Philosophy (Africa) 404 Modern Philosophy (Africa)
405 Modern Philosophy (Africa) 407 Marxist Philosophy in The Communication and Development of Africa
41 North African Philosophy 42 East African Philosophy 43 West African Philosophy (1) 44 West African Philosophy (2)
45 West African Philosophy (3) 46 Central African Philosophy 47 South African Philosophy (1) 48 South African Philosophy (2)
5 European Philosophy
502 Ancient Philosophy (Europe) 503 Medieval Philosophy (Europe) 504 Modern Philosophy (Europe)
505 Modern Philosophy (Europe) 507 The spread and development of Marxist philosophy in Europe
51 Eastern and Central European Philosophy (I) 52 Eastern and Central European Philosophy (II)
53 Nordic Philosophy 54 Southern European Philosophy (I) 55 Southern European Philosophy (II) 56 Western European Philosophy
p>
6 Oceanic Philosophy
7 American Philosophy
80 Science of Thinking (General Introduction)
81 Logic (Theoretical Theory)
0 General Introduction 811 Dialectical Logic 812 Formal Logic (Famous Science, Dialectics)
[813] Mathematical Logic (Symbolic Logic) (Suitable for O141) [814] Probabilistic Logic
815 Philosophical logic (non-classical logic) 819 Applied logic
82 Ethics (moral philosophy)
0 General 821 Outlook on life, philosophy of life 822 National morality 823 Family, Marriage Morality
824 Social Morality 825 Personal Cultivation
83 Aesthetics
0 General Introduction
832 Aesthetics and Social Production 832 Aesthetics and Reality Social Life[835] Art Aesthetics (Should Enter J01)
84 Psychology
0 General Introduction
841 Psychological Research Methods 842 Psychological Processes and Psychological Practices 843 Generative Psychology
844 Developmental Psychology (Human Psychology) 845 Physiological Psychology
846 Abnormal Psychology, Pathological Psychology, Superconscious Psychology 848 Personality Psychology, Personality Psychology
849 Applied Psychology
9 Atheism, Religion
91 Atheism 92 Religion 93 Mythology and Primitive Religion 94 Buddhism 95 Taoism
96 Islam (Islam) 97 Christianity 98 Other religions 99 Superstition
Social Sciences
C General Introduction to Social Sciences
0 Social Science Theory and Methodology
1 Current situation and overview of social sciences
2 Institutions, groups, conferences
3 Social science research methods
4 Social science education and General 5 Social science series, collections, serial publications
51 series (Huikeshu) 52 complete works, anthologies 53 collections, conference proceedings 54 yearbooks, annuals
55 serial publications, Journal
6 Social Science Reference Book
[7] "Social Science Literature Search Book (please check G257.33, Z88/89)"
8 Statistics
81 Statistical Methods
[82] Specialized Statistics (suitable for entry into related disciplines)
83 Statistical data from countries around the world
91 Society 92 Demography 93 Management
[94] Systems theory (systems, systems engineering) (please check N94)
96 Talent science
D Politics, Law
0 Political Theory
1/3 Communist Movement, Communist Party
1 International Communist Movement 2 Communist Party of China, Communist Youth League 3 Communist Parties of various countries
4 Workers, farmers, youth, women’s movements and organizations
5 World Politics
6 Chinese Politics
7 Politics of various countries
73 Asian Politics 74 African Politics 75 European Politics 76 Oceania Politics
77 Americas Politics
8 Diplomacy, International Relations
9 Law
E Military
0 Military Theory 1 World Military 2 Chinese Military
3/7 Military of various countries
3 Asian military 4 African military 5 European military 6 Oceanic military 7 American military
8 Strategy, tactics, battles
9 Military technology 99 Military topography , Military Geography
F Economics
0 Political Economics 1 Economic overview of various countries in the world, economic history, economic geography 2 Economic Planning and Management
3 Agricultural Economy 4 Industrial economy 5 Transportation economy 6 Somewhat economics
7 Trade economy 8 Finance, finance
G Culture, science, education, sports
0 Cultural theory
1 Overview of cultural undertakings in various countries around the world 11 World military 12 Chinese military 13 Asian military
14 African military 15 European military 16 Oceanic military 17 American military
2 Information and knowledge dissemination
3 Science, scientific research
4 Education
4 Education 5 Educational undertakings in various countries around the world 6 Education at all levels 7 Various types of education
8 Physical Education
H Language and Writing
0 Linguistics
1 Chinese
2 Chinese Minority Languages
3 Commonly used foreign languages ??31 English 32 French 33 German 34 Spanish 35 Russian
36 Japanese 37 Arabic
4/84 Languages ??of various language families
4 Sino-Tibetan language family 5 Altaic language family (Turkic-Mongol-Tungustic language family)
61 Austroasiatic language family 62 South Indian language family (Dravidian language family, Dravidian language family)
63 Austronesian language family (Malaya-Polynesian language family) 64 Northeast Asian language family
65 Ibero-Caucasian language family 66 Finno-Ugric language family 67 Semitic-Samine language family
7 Indo-European Languages ??81 African Languages ??83 American Languages ??84 Oceania Languages ??
9 International Auxiliary Languages ??
I Literature
0 Literary Theory
1 World Literature
2 Chinese Literature
3/7 Literature from various countries 3 Asian Literature 4 African Literature 5 European Literature
6 Ocean State Literature 7 American Literature
J Art
0 Art Theory
1 Overview of art in various countries in the world 2 Painting 29 Calligraphy, seal cutting
3 Sculpture 4 Photography Art 5 Arts and Crafts
[59] Architectural Art (please check TU-8)
6 Music 7 Dance 8 Theater Art
9 Film, Television Art
K History, Geography
0 Historical Theory
1 World History
2 Chinese History
3/7 History of various countries
3 Asian history 4 African history
5 European history 6 Oceania history 7 American history
81/83 Biography
81 Biographies of world figures and research and compilation of biographies 82 Biographies of Chinese figures
83 Biographies of figures from various countries
85/88 Cultural relics and archeology
85 Archeology 86 World cultural relics and archeology 87 Chinese cultural relics and archeology
88 Cultural relics and archeology of various countries
89 Customs and habits
9 Geography
Natural sciences
N General Introduction to Natural Sciences
0 Natural science theory and methodology 1 Current status and overview of natural science
2 Natural science institutions, groups, conferences 3 Natural science research methods
4 Natural science education and Popularization 5 Natural Science Series, Anthology, and Continuous Publications
6 Natural Science Reference Tool Book[7] "Natural Science Literature Retrieval Tool Book (Please check G257.36, Z88/89)" p>
8 Natural science surveys and inspections 91 Natural research, natural history
94 Systems theory (systematics, systems engineering) [99] Information science, information work (please check G35)
O Mathematical Science and Chemistry
1 Mathematics
11 Classical Mathematics 12 Elementary Mathematics
13 Advanced Mathematics 14 Mathematical Logic, Fundamentals of Mathematics 15 Algebra, Number theory, combinatorial theory
17 Mathematical analysis 18 Geometry, topology
19 Overall analysis, analysis on manifolds 21 Probability theory, mathematical statistics
22 Operations research 23 Cybernetics, information theory (mathematical theory)
24 Computational mathematics 29 Applied mathematics
3 Mechanics
31 Theoretical mechanics (general mechanics 32 Vibration theory
33 Continuum mechanics (deformable body mechanics) 34 Solid mechanics 35 Fluid mechanics
369 Physical mechanics 37 Rheology 38 Explosion mechanics 39 Applied mechanics
4 Physics
p>41 Theoretical physics 42 Acoustics 43 Light 44 Electromagnetism, electrodynamics
45 Radio physics 46 Vacuum electronics (electron physics)
47 Semiconductor physics 48 Solid State Physics 51 Low Temperature Physics
52 High Pressure and High Temperature Physics 53 Plasma Physics 55 Heat and Material Molecular Kinetic Theory
56 Molecular Physics, High Energy Physics 59 Applied Physics Study
6 Chemistry
61 Inorganic Chemistry 62 Organic Chemistry 63 Polymer Chemistry (Polymer)
64 Physical Chemistry (Theoretical Chemistry), Chemical Physics 65 Analytical Chemistry 69 Applied Chemistry
7 Crystallography
P Astronomy, Earth Science
1 Astronomy 2 Surveying and Mapping 3 Geophysics 4 Meteorology 5 Geology
6 Geology (2) 7 Oceanography 9 Physical Geography
Q Biological Sciences
1 General Biology 2 Cytology 3 Genetics 4 Biology 5 Biochemistry
6 Biophysics 7 Molecular biology 81 Bioengineering [89] Environmental biology (please check X17)
91 Paleontology 93 Microbiology 94 Botany 95 Zoology 96 Entomology 8 Anthropology
R Medicine, Health
1 Preventive Medicine, Hygiene 2 Chinese Medicine 3 Basic Medicine 4 Clinical Medicine
5 Internal Medicine Study 6 Surgery 71 Obstetrics and Gynecology 72 Pediatrics
73 Oncology 74 Neurology and Psychiatry 75 Dermatology and Venereology 76 Otolaryngology 77 Ophthalmology
78 Oral Science
79 Foreign Ethnomedicine
8 Special Medicine
9 Pharmacy
S Agricultural Science
1 Basics of Agriculture Science 2 Agricultural Engineering 3 Agronomy (Agronomy) 4 Plant Protection
5 Crops 6 Horticulture 7 Forestry 8 Animal Husbandry, Veterinary Medicine, Hunting,
Silkworms, bees 9 Aquaculture, fishery
T Industrial science
TB General industrial technology
1 Basic engineering science
2 Engineering design and Surveying
3 Engineering Materials
[31] Metallic materials (please check TG4)
32 Non-metallic materials
33 Composite materials
35 Low-temperature resistant materials, high-temperature resistant materials
37 Corrosion-resistant materials
39 Other special performance materials
4 General industrial technology and Equipment
41 Blasting technology
42 Sealing technology
43 Film technology
44 Powder technology
48 Packaging Engineering
49 Factories, workshops
5 Acoustic engineering
6 Refrigeration engineering
7 Vacuum technology
8 Photography Technology
9 Metrology
TD Mining Engineering
1 Mine Geology and Surveying
2 Mine Design and Construction
3 Mine Pressure and Support
4 Mining Machinery
5 Mining Transportation and Equipment
6 Mining Electrician
7 Mining Safety and Labor Protection
8 Mining
9 Ore Processing
TE Petroleum and Natural Gas Industry
1 Petroleum and Natural Gas Geology and Exploration
2 Drilling Engineering
3 Oil and Gas Field Development and Exploitation
5 Offshore Oil and Gas Field Development and Exploitation
6 Petroleum and Natural Gas Processing Industry
8 Petroleum and natural gas storage and transportation
9 Petroleum machinery and equipment and automation
[99] Environmental protection and comprehensive utilization of petroleum and natural gas industry (should enter X74) p>
TF Metal Industry
0 General Questions
1 Metallurgical Technology
3 Metallurgical Machinery, Metallurgical Production Automation
4 Iron and steel smelting (ferrous metal smelting) (overview)
5 Iron smelting
6 Iron alloy smelting
7 Steel making
79 Other ferrous metal smelting
8 Non-ferrous metal smelting
TG Metallurgy, metal technology
1 Metallurgy, heat treatment
2 Casting
3 Metal pressure processing
4 Welding, metal cutting and bonding
5 Metal cutting and machine tools
7 Tools, abrasives, Grinding tools, fixtures, molds, hand tools
8 Tolerance and technical measurement and mechanical measuring instruments
9 Fitter technology, assembly technology
TH Mechanical and instrument technology
11 Mechanics (Basic Theory of Mechanical Design)
12 Mechanical Design, Calculation and Drawing
13 Mechanical Parts and Transmission Devices
14 Materials for machinery manufacturing
16 Machinery manufacturing process
17 Operation and maintenance
18 Machinery factory (workshop)
2 Lifting Transportation machinery
3 Pumps
4 Gas compression and transportation machinery
6 Special machinery
7 Instruments and meters
TJ Arms Industry
0 General Questions
2 Firearms
3 Artillery
4 Ammunition, fuses, pyrotechnics
5 Explosive equipment, pyrotechnics, and explosives
6 Underwater weapons
7 Rockets, missiles
8 Tanks, battleships, fighter planes, aerospace weapons
9 Nuclear weapons and other special weapons and protective equipment
TK Power Industry
0 General questions
1 Thermal engineering, heat engine
2 Steam power engineering
3 Thermal measurement and automatic thermal control
4 Internal combustion engine engineering
5 Special thermal energy and its utilization
6 Bioenergy and its utilization
7 Water energy, hydraulic machinery
8 Wind energy, wind machinery
91 Hydrogen energy and its utilization
TL Atomic energy technology
1 Basic theory
2 Nuclear fuel and its production
3 Nuclear reactor engineering
4 Various nuclear reactors and nuclear power plants
5 Accelerator
6 Controlled thermonuclear reaction (fusion reaction theory and experimental device)
7 Radiation protection
8 Particle detection technology, radiation detection technology and nuclear instruments Instruments
91 Nuclear explosion
92 Production and preparation of radioactive isotopes
929 Radiation sources
93 Packaging, transportation and Storage
94 Management and Comprehensive Utilization of Radioactive Waste
99 Application of Atomic Energy Technology
TM Electrical Technology
0 General Questions
1 Basic electrical theory
2 Electrical materials
3 Motor
4 Transformers, converters and reactors
5 Electrical appliances
6 Power generation and power plants
7 Power transmission and distribution projects, power grids and power systems
8 High voltage technology
91 Independent power supply technology (direct power generation)
92 Electrification, electric energy application
93 Electrical measurement technology and instruments
TN Radio electronics, telecommunications technology
p>0 General questions
1 Vacuum electronic technology
2 Optoelectronic technology, laser technology
3 Semiconductor technology
4 Microelectronics, integrated circuits (IC)
6 Electronic components and assemblies
7 Basic electronic circuits
8 Radio and telecommunications equipment
91 Communications
92 Wireless Communications
93 Broadcasting
94 Television
95 Radar
96 Radio Navigation
97 Electronic countermeasures (interference and anti-interference)
[98] Radio and telecommunications measurement technology and instruments (please check TM93)
99 Radio electronics Application
TP Automation technology, computing technology
1 Basic theory of automation
11 Automation system theory
13 Automation control theory
p>14 Automatic information theory
15 Automatic simulation theory (automatic simulation theory)
17 Switch circuit theory
18 Artificial intelligence theory
2 Automation technology
and equipment
20 General issues
21 Automation components and parts
23 Automation devices and equipment
24 Robotics
27 Automation system theory
29 Application of automation technology in various aspects
3 Computing technology, computers
30 General issues
31 Computer software
32 General calculators and computers
33 Electronic digital computers (discontinuous action electronic computers)
34 Electronic analog computers (continuous action computers) Functional computer)
35 Hybrid computer
36 Microcomputer
38 Other computers
39 Computer applications
6 Fluid technology (fluid control technology)
60 General issues
61 Fluid components
62 Fluid accessories
63 Detection and signaling device
64 Actuator
65 Power source
66 Jet control circuit
67 Jet automatic control system
69 Application of jet technology
7 Remote sensing technology
70 General issues
72 Remote sensing methods
73 Detection instruments and systems
75 Interpretation, recognition and processing of remote sensing images
79 Application of remote sensing technology
8 Telecontrol technology
80 General questions
[81] Components and components (should be included in TP21)
83 Telecontrol devices
84 Channels
87 Telecontrol system
89 Application of telecontrol technology in various aspects
TQ Chemical Industry
0 General questions
1 Basic theory
2 Chemical process (physical process and physical and chemical process)
3 Chemical reaction process
4 Chemical raw materials and auxiliary materials
5 Chemical machinery and equipment
6 Chemical production process, final processing and packaging
7 Chemical products and by-products
8 Chemical factory
[09] Treatment and Comprehensive Utilization of Chemical Industry Wastes (Should be included in X78)
11 Basic Inorganic Chemical Industry
110 General Issues
111 Inorganic Acid production
113 Ammonia and ammonium salt industry
114 Chlor-alkali industry
115 Inorganic salt industry
116 Industrial gases
117 Special gases
118 Inorganic peracid and persalt
12 Chemical industry of non-metallic elements and their inorganic compounds 13 Chemical industry of inorganic compounds of metallic elements
15 Electrochemical industry 16 Electric heating industry, high temperature products industry
17 Silicate industry 2 Basic organic chemical industry
31 Polymer compound industry (polymer industry)
32 Synthetic resin and plastic industry 33 Rubber industry
34 Chemical fiber industry
35 Cellulose chemical processing industry 41 Production of solvents and plasticizers
> 42 Production of reagents and pure chemicals 43 Adhesive industry
44 Chemical fertilizer industry
45 Pesticide industry 46 Pharmaceutical chemical industry 51 Fuel chemical industry
52 Coking Chemical industry
53 Coal chemistry and coal processing and utilization
54 Coal gasification industry
55 Fuel lighting industry
56 Explosives industry , Match Industry
57 Photosensitive Material Industry
58 Magnetic Recording Material Industry
61 Dyestuff and Intermediate Industry
62 Pigment Industry
63 Paint industry
64 Chemical processing industry of oils and waxes, soap industry
65 Perfume and cosmetics industry
9 Other chemical industries
TS Light industry, handicraft industry
0 General questions
1 Textile industry, dyeing and finishing industry
2 Food industry
3 Salt industry
4 Tobacco industry
5 Leather industry
6 Wood processing industry, furniture manufacturing industry
7 Paper industry
8 Printing industry
91 Hardware industry
93 Arts and crafts manufacturing industry
94 Clothing industry, shoe industry
95 Other light industries and handicrafts
97 Living supply technology
TU Architectural science
1 Basic science of architecture
19 Architectural survey
2 Architectural design
3 Building structure
4 Soil mechanics, foundation engineering
5 Building materials
6 Building construction machinery and equipment
7 Building construction
8 House construction equipment
9 Underground construction
7 High-rise Architecture
98 Regional Planning, Town Planning
99 Municipal Engineering
TV Water Conservancy Engineering
1 Basic Courses in Water Conservancy Engineering
21 Water data survey and water conservancy planning
22 Hydraulic survey and design
3 Hydraulic structure
4 Hydraulic materials
5 Water conservancy project construction
6 Water conservancy hubs and hydraulic structures
7 Water capacity utilization, hydropower station projects
8 River control projects and flood control projects
[91] Canal (canal, channel) project (suitable for U61)
[02] Harbor project (suitable for U65)
[93] Farmland Water conservancy project (should enter S27)
U Transportation
1 Comprehensive transportation
2 Railway transportation
4 Road transportation
41 Road Engineering
44 Bridge and Culvert Engineering
45 Tunnel Engineering
46 Automobile Engineering
461 Automobile Theory
462 Vehicle design and calculation
463 Automobile structural components
464 Automobile engine
465 Automotive materials
466 Automobile Manufacturing process
467 Automobile experiment
468 Automobile factory
469 Various purpose automobiles
47
1 Driving and using cars
472 Car maintenance and repair
473 Fuel and lubricants for cars
48 Other road transportation tools
49 Traffic Engineering and Road Transport Technology Management
6 Water Transport
[8] Air Transport
V Aviation, Aerospace
1 Aviation , Research and exploration of aerospace technology
11 Development of aviation and aerospace and space exploration
19 Application of aviation and aerospace
2 Aviation
21 Basic theory and experiment
22 Aircraft structure and design
23 Aviation engine (propulsion system)
24 Aviation instruments, equipment, control and navigation
25 Aviation materials
26 Aviation manufacturing process
27 Various types of spacecraft
31 Aviation fuels and lubricants
32 Aviation flight technology
35 Airport (station), airport and technical management
37 Aviation system engineering
4 Aerospace (space navigation)
41 Basic theory and experiment
42 Rocket and spacecraft structure (overall)
43 Propulsion system (engine, thruster)
44 Instruments, equipment, guidance and control
[45] Aerospace materials (please check V25)
46 Manufacturing process
47 Spacecraft and its carriers
51 Aerospace fuels (propellants) and lubricants
52 Aerospace technology
55 Ground equipment, test sites, launch sites, aerospace bases
57 Aerospace Systems Engineering
[7] Aviation and Aerospace Medicine (suitable for R85)
X Environmental Science
1 Basic Theory of Environmental Science
2 Comprehensive environmental research
3 Environmental protection management
4 Disasters and their prevention and control
5 Environmental pollution and their prevention and control
7 Waste treatment and comprehensive utilization
8 Environmental quality assessment and environmental monitoring
9 Labor protection science (safety science)
Comprehensive books
p>Z comprehensive books
1 series of books
2 encyclopedias, general books
3 dictionaries
4 collections of essays, Complete works, anthologies, and miscellaneous works
5 Yearbooks, annuals
6 Periodicals, serial publications
8 Book catalogs, abstracts, indexes
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