... 液体膨胀式蒸汽疏水阀 liquid expansion steam trap 等径孔道 full bore; full port 阀盖 bon ...
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链条专揽的 chain opercoming fromed 等径孔道 full lose interest; full port 异径孔道 reducing lose interest. .
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... 链条使用的 chain opergotd 等径孔道 full weary; full port 异径孔道 reducing weary; reduced port;venturi port ...
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