Joke Collection Website - Bulletin headlines - What does sm mean on the manhole cover? Who has the gift of reading?
What does sm mean on the manhole cover? Who has the gift of reading?
Generally, manhole covers are engraved with letters: DD, RL, W, Y and HZTV.
These letters are the property unit signs of cables in CMC, DD is power dispatching, RL is heat, W is sewage, Y is rain, and HZTV is cable TV.
The big SM you see may be the abbreviation of the city where you live, or the abbreviation of the name of the unit to which the underground facilities belong.
- Previous article:A collection of classic and practical class slogans and jingles
- Next article:Recyclable garbage handwritten newspaper slogan
- Related articles
- Planning Template for World Diabetes Day 2022 (6 selected articles)
- What inconvenience may be caused by the frequent occupation of fire lanes?
- How long is the border of China?
- The epidemic is over, I want to travel around the world with my car Corolla
- Introduction to Qian County Tofu Nao
- Brief introduction of Xuanhua Iron and Steel Company
- What are the parts of airport classification?
- Words, phrases and idioms related to Hunan cuisine
- Caring for public property starts with me.
- Reflections on the teaching of first grade Chinese z c s