If it is hard to stop booms once they are in full swing, it is no easier to prevent them from starting in the first place.
如果说，繁荣期一旦开始活跃要叫停决非易事，那么，打从一开始就叫停也没那么容易。
During the start and stop of the drive shaft, the swing frame of the soft support will have a very obvious vibration.
在传动轴启动和停转的过程中，软支承的摆架会有非常明显的振动，硬支承的摆架则没有这种现象。
Protection cage over the rolls with interlocked swing open front and rear parts, which stop the rolls when opened.
保护罩覆盖于辊筒之上，在打开时辊将停止转动。
Protection cage over the rolls with interlocked swing open front and rear parts, which stop the rolls when opened.
保护罩覆盖于辊筒之上，在打开时辊将停止转动。
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