柯林斯词典petcock /ˈpɛtˌkɒk/ 1. N a small valve for checking the water level in a steam boiler or draining condensed steam from the cylinder of a steam engine (蒸汽锅炉内检查水位的)小旋塞; (蒸汽机汽缸的)泄气阀 返回 pet cock