短語詞組短語Dynamic Balancing Electric Valves 電動動態(tài)平衡調(diào)節(jié)閥automatic balancing valves 自動流量平衡閥Nibco Circuit Balancing Valves 美國尼必可消防閥門manual balancing valves 靜態(tài)平衡閥 返回 balance valves