... 宽径比 width-diameter ratio 粒径比 particle diameter ratio 内径比 inside clearance ratio ...
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the ratio of the diameter of the glass to the width of the circular shaking;
葡萄酒杯的直径与圆周晃动的宽度的比率；
The relationship of deflection, crack spacing and maximum crack width with the stress, diameter and ratio of steel bars can be predicted by existing model presented in the code.
试验梁的挠度、裂缝间距和最大裂缝宽度与钢筋应力、钢筋直径和配筋率等因素的关系基本上可用现有模型预测。
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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