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What do you mean by four defenses?
Four prevention means that in chemical production, the focus of safety production in winter should be on equipment antifreeze, fire prevention in production area, personnel anti-skid and poisoning prevention.

1, in coal mining enterprises, refers to cold prevention, antifreeze, fire prevention and poisoning prevention.

2. In the electric power industry, it refers to fire prevention, explosion prevention, cold prevention, pollution flashover prevention and small animals prevention.

3. In building construction, it generally refers to fire prevention, electric shock prevention, poisoning prevention and collapse prevention.

China people have always regarded peace of mind and living and working in peace and contentment as their basic outlook on life, and carried it forward in peacetime. Therefore, safety is regarded as an important part of education. Due to the progress of society, the life style of human beings is becoming more and more complicated, and there are more and more situations that may endanger the safety of human life. Therefore, the International Friends Association calls on schools at all levels to strengthen the implementation of safety education and increase courses to match related courses and extracurricular activities.

Four prevention safety system:

1, do a good job in prevention and other special work. Prevent the destruction of spies. Immediately report suspicious circumstances to the public security organ. If there is any concealment or omission, the relevant personnel shall be investigated for responsibility.

2, do a good job of anti-theft. Doors of warehouses, financial offices and storerooms should be covered with iron sheets, and windows should be ironed. Flight attendants should stick to their posts and are not allowed to give the room keys to passengers. Passengers should check the indoor items and lock the doors and windows when they leave the store.

3, do a good job in fire prevention, fire control facilities and equipment are complete and effective, well maintained; Fire prevention tools should be placed in the open air, and all employees must be able to use fire fighting tools. Use fire and electricity safely. Flammable articles shall not be near kang, fire wall, stove and important fire prevention targets.

4. Do a good job in preventing public security disasters and accidents. Hotels with canteens should pay attention to hygiene and are not allowed to sell rotten food to passengers. The fire department should always check to prevent soot and gas poisoning. Buildings should be inspected and maintained frequently to prevent collapse.

Baidu Encyclopedia-Security Precautions