... double return valve 双止回阀, 双回流阀 double safety valve 双安全阀 double seat balanced valve 双座平衡阀 ...
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短语
双联弹簧式安全阀
Duplex safety valve
双联安全阀
double safety valve
;
HERION
双杠杆安全阀
double lever safety valve
双级安全阀
dual stage relief valve
泵用双向安全阀
Sniffle valves for pumps
双安全双隔断阀
Twinsafe DBB Valves
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