... 阀芯(包孕弥缝圈、杆等内件) trim 堵截式止回阀 stop check valve; non-return valve 1.1 管子 pipe ...
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...带侧向口的弯头(右向或者左向) side outlet elbo (right hand or left hand) 堵截式止回阀 stop check valve; non-return valve 气动阀 pneumatic operated valve ..
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