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 (蒸汽鍋爐內檢查水位的)小鏇塞; (蒸汽機汽缸的)泄氣閥 返回 pet cock