It was indicated that enhancing the friction between the material and the rotary kiln wall is easy to carry out the rolling motion from the aspect of force moment.

本文从力矩的角度出发，得出了要实现物料的滚落状态，可以提高物料与窑壁间的摩擦系数，并提出了具体方法。

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Maybe the most valuable aspect is that it can also be used for training the three planes of motion with live visual and auditory feedback.

也许最有价值的一点在于，这能通过视觉和听觉反馈来训练运动三面。

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