海船船员考试（轮机英语）考点练习：船舶空调系统的组成及主要设备 ... overcharge ①n.过充电；②v.过载 petcock n.小龙头 phased a.定相的 ...
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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
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