【电学】电开关灭火

arc-extinguishing chamber

earth fault extinguishing device (earthfault neutralising device)

operational test for water fire-extinguishing system【安全】

fire-extinguishing plant, stationarily-arranged with hydrant

extinguishing tube

fire-extinguishing plant, automatic

maintaining, increasing the flow of arc-extinguishing chamber

production of fire-extinguishing substances