idler roll

基本解释

Now the training effect takes place and the conveyor belt does what it is told to do by the center roll of the troughing idler.
现在实质性的影响发生了，皮带会延着中心托辊设定的路线运行。
The only part of the troughing idler that hs any training effect on the conveyor belt is the center roll indicated by the arrow.
如图中箭头所示：槽形托辊组成中对皮带运行有实质影响的唯一部分就是中心托辊。
The method to develop high precision and durable idler wheel to dress the single roll wheel is expounded. The experiments are made and the feasibility conclusion is obtained.
提出了开发高精度、高耐用度修整单滚道砂轮用滚轮的方法，在实验的基础上得出了可行性结论。