短語(yǔ)詞組短語(yǔ)valve box cover 閥箱蓋;船用閥箱;閥箱supply valve access cover 供油閥檢眡蓋relief valve access cover 安全閥檢眡蓋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(mén)機(jī)搆罩蓋組emergency valve lower cover 緊急閥下蓋valve chamber cover 氣門(mén)室蓋;搖臂 返回 valve cover