基本解释n.放泄用小型旋塞(小龙头;油门;手压开关)同根派生 petcock相关词英汉例句The doctor shut off the petcock. 医生关掉小活栓。bilge pump petcock 舱底泵小塞门The doctor shut off the petcock 医生关掉小活栓。feed pump petcock 添水泵小型旋塞petcock更多例句