【机械工程】气瓶阀门【机械工程】集气筒阀门

fault indication cable, filled with gas, oil

refinery gas steam reforming catalyst

gas ionisation as input quantity

firedamp alarm【矿】;gas alarm【矿】;methanophone【矿】

aero-gas turbine

inside frosting gas filled lamp bulb

coercible gas

feed-water preheating with exhaust steam and smoke gas