短語(yǔ)詞組短語(yǔ)Dynamic Balancing Electric Valves 電動(dòng)動(dòng)態(tài)平衡調(diào)節(jié)閥automatic balancing valves 自動(dòng)流量平衡閥Nibco Circuit Balancing Valves 美國(guó)尼必可消防閥門(mén)manual balancing valves 靜態(tài)平衡閥 返回 balance valves