A controller is operable to control the rotation of the first roller and the rotation of the second roller based on the first detection signal and the second detection signal.
以及控制器，其可工作以基于所述第一检测信号以及所述第二检测信号来控制所述第一辊的所述转动以及所述第二辊的所述转动。
The rotational axle of a first roller has a fixed mounting whilst the rotational axle of a second roller has a displaceable mounting.
第一辊子的转轴具有固定安装部而第二辊子的转轴具有可移动安装部。
The first and second bends additionally cooperate to form a helical roller track on the outside of the tank.
此外，第一和第二弯曲协作以在桶的外侧形成螺旋状辊道。
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