片语
protective atmosphere casting保护浇注
nitrogen base protective atmosphere氮基保护气氛
protective atmosphere tempering保护气体储罐
ammonia dissolution protective atmosphere氨分解保护气氛
protective atmosphere generation system保护气氛发生装置
protective atmosphere gas storage保护气体储罐
protective furnace atmosphere炉腔保护空气层
protective atmosphere equipment[冶]
protective hydrogen atmosphere氢保护气氛