Each check valve shall be both center and edge-guided to ensure repeatable seating and minimize localized wear.
每个止回阀应该都配置中心和边缘引导，确保可更换阀座密封和最小的局部磨损。
Can swipe the spheroid clean on the sharp valve seat edge at the time of each operation.
每次操作锋利的阀座边缘都可以把球体刮擦干净。
Air valve size and airflow resistance losses of valves always speed and the size of the spring-loaded edge.
气阀阻力损失大小与气流的阀隙速度及弹簧力大小有关。
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