橡胶波纹管机械密封-rubber-bellows mechanical seal 29.聚四氟乙烯波纹管机械密封-PTFE-bellows mechanical seal .
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... Tandem mechanical seal|串联机械密封件 Rubber-bellows mechanical seal|橡胶波纹管机械密封件 PTFE-bellows mechanical seal|聚四氟乙烯波纹管机械密封件 ...
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