If the cup plug is missing, the park pawl anchor shaft can move out of position under certain conditions.
如果该杯状固定塞脱落，驻车止动爪定位销可能在特定情况下滑移出正常位置。
The invention use streamlined guide plate and cup wheel, it is uneasy to plug, and can achieve a small headwater loss purpose.
本发明用流线型导流板及杯式叶轮，不易堵塞，且可以达到水头损失小的目的。
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