短語詞組短語valve box cover 閥箱蓋;船用閥箱;閥箱supply valve access cover 供油閥檢視蓋relief valve access cover 安全閥檢視蓋supplementary valve upper cover 輔助閥上蓋release valve lower cover 緩解閥下蓋valve e cover 閥罩;閥蓋valve mechanism cover group 氣門機(jī)構(gòu)罩蓋組emergency valve lower cover 緊急閥下蓋valve chamber cover 氣門室蓋;搖臂 返回 valve cover