Sanfang handwritten newspaper daquan

"Three defenses" means three defenses and three protections. In the electronic industry, "three defenses" generally refers to the "mildew-proof, moisture-proof and salt fog-proof" of electronic products. Broadly speaking, the surface treatment of products can reduce or eliminate the adverse effects of complex environment on the performance of electronic devices. The process of applying three-proof paint on the circuit board by the manufacturer of electronic products after production and debugging is called "three-proof".

In agriculture, the three defenses refer to "drought prevention, flood control and wind prevention"; In industry, three defenses refer to "anti-freezing, anti-skid and anti-poisoning", while in construction industry, they are waterproof, fireproof and shockproof.

In terms of "creating health", there are two concepts of "three defenses": the three defenses of imported food refer to "fly prevention, dust prevention and pollution prevention"; Public places refer to "anti-rats, anti-flies and anti-mosquitoes".

Three major equipment use

Personal protective equipment mainly includes respiratory protective equipment, skin protective equipment, protective box and all-round hand and foot protective equipment.

1 Respiratory protective equipment

Respiratory protective equipment mainly includes gas masks and protective masks. Gas masks are used to protect people's respiratory organs, eyes and face from toxic agents, biological warfare agents and radioactive substances. Protective masks can be used without gas masks or gas masks. When using the protective mask, it is necessary to dip it in alkali or put it in.

2. Skin protection equipment

Skin protection equipment mainly includes anti-virus gloves and anti-virus clothing. Gas gloves are made of rubber cloth to prevent people's hands from being hurt by toxic agents, radioactive substances and biological warfare agents. Anti-virus suit is a kind of full-body skin protection equipment consisting of coat, trousers and boots. In addition, anti-virus cloaks and anti-virus boots can also be used for skin protection.

3. Protective box

The protective box is a kind of personal protective equipment, which contains a phosphorus dissolving needle, a tube of skin disinfectant, a new phosphorus preventing tablet and three kinds of phosphorus dissolving nasal powder.