bolted cover 螺栓盖; 螺栓固定盖...
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... bolted connection 螺栓接合 bolted cover 螺栓盖 bolted joint 螺栓结点 ...
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... regulating disc 调解型阀瓣BB bolted bonnet 螺栓连接阀盖 BC bolted cover 螺栓连接阀盖 BG bevel gearing 斜齿轮传动安置 ...
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止回阀,阀体SFVC2A JPI800 ,内件13Cr,BC应该是螺栓衔接的阀帽(Bolted Cover),升降式,承插焊衔接;
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