The necessary pulley diameter is defined at a certain radius by the deflection properties of the belt.
这是原文，直译的话，应该是“传动滚筒直径在一定程度上根据皮带跑偏特性来定义。
It has considerable relation to the diameter of pulley groove that the wire rope can or can't work all right and reach normal service life.
钢丝绳能否顺利工作并达到正常使用寿命，与滑轮绳槽直径有很大关系。
Pulleys are on the market that permit an adjustment in the width of the groove. The effective pitch diameter of the pulley is thus varied, and moderate changes in the speed ratio can be secured.
带轮运行一定时间后，槽的宽度可以调节，这样带轮的节距是变化的，因此需要进行适当的调整以满足速度比的要求。
Pulleys are on the market that permit an adjustment in the width of the groove. The effective pitch diameter of the pulley is thus varied, and moderate changes in the speed ratio can be secured.
带轮运行一定时间后，槽的宽度可以调节，这样带轮的节距是变化的，因此需要进行适当的调整以满足速度比的要求。
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