petcock
英：['petkɒk] 美： ['petˌkɒk]
petcock 基本解释
n.小活栓，小龙头；
英英释义
petcock[ 'petkɔk ]
n.regulator consisting of a small cock or faucet or valve for letting out air or releasing compression or draining
petcock 相关例句
权威例句
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