【电学】内置于静态变流器中的闸流管熄火电路

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