ball spring plunger
... ball spring 弹子弹簧 ball spring plunger 球形弹簧柱塞 valve ball spring 止回阀球弹簧 ...
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泵阀件采用带导向杆的半球形柱塞结构，弹簧制动，精确控制阀球与阀座对中，启闭动作及时。
The pump valve has a structure of semi-spheric plunger with guide rod, and its seat and ball are aligned by means of a spring, and it is opened and closed in time.
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