CQ 螺纹球阀 CQ Thread Ball Valves L 形三通式 L-pattern three way T 形三通式 T-pattern three way 安全阀 Safety valve 暗杆闸阀 Inside screw nonrising stem type gate valve 百叶窗; 闸板 shutter 百叶窗式挡板 louver damper 摆阀式活塞泵 swing gate piston pump 保温式 Steam jacket type 报警阀 alarm valve 报警阀; 信号阀; 脉冲阀 sentinel valve 背压调节阀 back pressure regulating valve 背压率 Rate of back pressure 本体阀杆密封 body stem seal 波纹管阀 Bellows valves 波纹管密封阀 bellow sealed valve 波纹管密封式 Bellows seal type 波纹管平衡式安全阀 Bellows seal balance safety valve 波纹管式减压阀 Bellows reducing valve 波纹管式减压阀 Bellows weal reducing valve 薄膜 thin film 薄膜; 隔膜 diaphragm 薄膜式减压阀 Diaphragm reducing valve 薄型闸阀 Thin Gate Valves 不封闭式 Unseal type 槽车球阀 Tank Lorry Ball Valves 颤振 Flutter 常闭式 Normally closed type 常开式 Normally open type 超低温阀门 Cryogenic valve 超高压阀门 Super high pressure valve 超过压力 O