Cock and ball: Turn off the prop is a plunger or a ball, rotating around its own axis.

旋塞和球形：关闭件是柱塞或球，围绕本身的中心线旋转。

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Turn off the prop is a plunger or a ball, rotating around its own axis.

关闭件是柱塞或球，围绕本身的中心线旋转。

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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.

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。

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