短語詞組短語graduating g valve spring 節(jié)制閥彈簧graduating g valve 節(jié)制閥graduating valve spring [鉄路][機(jī)]節(jié)制閥彈簧;遞開閥簧equalizing graduating valve 均衡遞動(dòng)閥;均衡遞開閥graduating valve lever 遞開閥桿emergency graduating valve 緊急遞開發(fā)graduating valve ring 節(jié)制閥彈簧 返回 graduating valve