Repairable 2-piece stem drive.

可维修的2件式阀杆驱动。

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Operating Principle: The diaphragm valve is a handwheel-operated valve, utilizing a two-piece stem separated by non perforated diaphragms. These diaphragms prevent leakage along the valve stem .

运转原理：膜板阀是一种手轮型阀门，它采用两个由非穿孔横膈膜隔开的阀杆。这些横膈膜防止了沿着阀杆的泄漏。

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An excellent piece with the unusual quality of stem cell truth, something very rare in North America.

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