然而，他们的成长开始进入减速阶段。
给出燃料抛散径向运动加速阶段、减速阶段的相似准则。
The similarity criterions in the acceleration stage and the deceleration stage of the fuel dispersal process are put forward.
交流矿井提升机的减速阶段，一般要求主要用动力制动，但速度闭环控制难实现。
Power braking is usually required when mine hoist is at reducing stage, but sPeed closed-loop control is difficultly realized.
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