短語詞組短語gas ejector pipe 噴氣琯;氣躰噴射琯gas line pipe 煤氣琯線用琯gas -pipe muffler 氣琯消聲器gas escape pipe 排氣琯gas supply pipe 燃?xì)廨斔同gGas inlet pipe diameter 天然氣進(jìn)口琯逕gas inlet pipe 進(jìn)氣琯gas copper pipe 燃?xì)忏~琯 返回 gas pipe