The counterrotation reduces the net friction torque.
反向旋转减少了净摩擦力。
2
Avoid counterrotation of the pump which is very easy to damage.
泵不允许反向旋转，否则极易损坏。
3
Avoiding the possible counterrotation of the oil pump while starting the machine, otherwise it may lead to the out blown of the axle seal and entering of air.