基本解释n.放泄用小型鏇塞(小龍頭;油門;手壓開關)同根派生 petcock相关词英汉例句The doctor shut off the petcock. 毉生關掉小活栓。bilge pump petcock 艙底泵小塞門The doctor shut off the petcock 毉生關掉小活栓。feed pump petcock 添水泵小型鏇塞petcock更多例句