rotary valve complement
... 回转阀簧 rotary valve spring 回转阀总成 rotary valve complement 旋转滑阀 回转阀 revolvingvalve ...
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回转机构：回转驱动总成具有反转防止阀和减震功能的长寿命设计， 操作更方便。
Return mechanism: the return driving assembly has long service life design of back stop valve and shock-absorbing function, offering easy operation.
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