petcock

['petkɔk]

n. 放泄用小型旋塞(小龙头, 油门, 手压开关)

n.

扭塞; 小活栓

petcock

petcock['petkɔk]n.1.■放油(或放水)用开关；小型旋塞；小龙头2.■手压开关3.■(内燃机等的)泄气阀；油门 [亦作 petcock]

1. a small valve positioned in the pipe of a steam boiler or cylinder of a steam engine for drainage or testing
   （蒸汽锅炉管子上的）小龙头，小旋阀；（蒸汽机气缸中的）泄气阀
   

petcock

名词 petcock:

regulator consisting of a small cock or faucet or valve for letting out air or releasing compression or draining

petcock

■The doctor shut off the petcock

医生关掉小活栓。

■feed pump petcock

添水泵小型旋塞

■bilge pump petcock

舱底泵小塞门