The shift mechanism incorporates a larger internal roller and stronger shift-spring tension for more positive shifting.
这种转变机制，内部集成了一个更大更强的转向辊，弹簧张力更积极的转变。
After a winter of roller coaster extremes, it seems only appropriate that the first day of spring should be colder than the last week of winter.
经过了一个过山车一般变化无常的冬天，似乎春天的第一天比上周的冬天更冷才更合乎情理。
Such as the calculation of the roller spring pressure, the pulling force of the chain, the consumption of the power etc.
如碾压辊弹簧压力的确定，驱动链拉力的计算，功率的消耗计算等。
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