stem guiding
阀杆导向（Stem guiding）：阀盖上引导轴套，阀塞与阀座环连接，作用于阀塞杆。
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... 套筒导向 cagcguiding 阀杆导向 stcmguiding 填料函祖件 packingboxasscmbly ...
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阀滚花导向杆 knurled valve guide
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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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