Xi'an fire extinguishers, metal heads from the date of delivery from every five years to be together to do a pressure test barrel, carbon dioxide fire extinguisher, those who fail must be replaced. Xi'an fire extinguishers, fire extinguisher use, in 1905, Xi'an extinguishers, Professor Laurent Russia in St. Petersburg invented a foam fire extinguishing agent, mixing aluminum sulfate and sodium bicarbonate solution and the addition of stabilizers, foam, spray After generating carbon dioxide bubbles, floating in the burning of oil, paint or gasoline, can effectively cut off oxygen, smothering put out the flames. Types of fire extinguishers, fire extinguisher Xi'an, Shaanxi JW fire fighting equipment provided by the Fire Equipment Co., Ltd. Shaanxi Jiwei. Shaanxi Jiwei Fire Equipment Co. (www.jiweixiaofang.com) (www.jiweixiaofang.com) strong, credible, in other industries, Xi'an has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Shaanxi JW firefighting equipment into the brilliant and you work for a better future!