短语词组短語ono -rising-stem valve 暗杆閥門non -rising stem valve 不陞杆式閥;暗杆閥rising -stem double-disk parallel slide valve 明杆平行式雙牐滑閥Rotate -Rising stem 鏇轉陞降閥杆Non -rising stem NRS 非陞杆式 返回 rising stem