The counter rotation reduces the net friction torque.
反向旋转减少了净摩擦力。
Avoid counter rotation of the pump which is very easy to damage.
泵不允许反向旋转，否则极易损坏。
Avoiding the possible counter rotation of the oil pump while starting the machine, otherwise it may lead to the out blown of the axle seal and entering of air.
滤油机在启动时，应注意不能使油泵反转，以免引起油泵轴封吹出导致吸入空气。
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