In its simpler form, the mechanism consists of a CAM operated lever to vibrate the back roll, called the whip roll.

比较简单的方式是机构中包括一个由凸轮控制的连杆，用以驱动后梁摆动。

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In its simpler form, the mechanism consists of a CAM operated lever to vibrate the back roll, called the whip roll.

比较简单的方式是机构中包括一个由凸轮控制的连杆，用以驱动后梁摆动。

youdao