До н.э. Сухой химический порошок

Sodium bicarbonate dry chemical fire extinguishing agent has the specialties of high extinguishing speed, high fighting fire efficiency, harmless to people and animals ,good insulation property and long store period. It can be filled in portable ,cart fire extinguishers. It is used to extinguish the fires of flammable liquids(B type).gasses and electric equipments(C type). It is widely used for fighting fires of oil fields,oil stores, ships, warehouses, oil refineries, electricity station and petrochemical enterprises