基本解释[鉄路][機] 節制閥，調節閥；堦段制動閥词组短语短語graduating g valve spring 節制閥彈簧graduating g valve 節制閥graduating valve spring [鉄路][機]節制閥彈簧;遞開閥簧equalizing graduating valve 均衡遞動閥;均衡遞開閥graduating valve lever 遞開閥杆graduating valve更多词组专业释义交通運輸工程節制閥