我们常用的圆柱齿轮传动比小，体积大、结构笨重。
We have used the CYLINDRICAL gear transmission ratio of small, large, heavy structure.
楔形驱动轮存在着结构笨重、滚动阻力大、效率低等问题。
Nowadays there are several problems existing in the wedged wheel of P.
传统的经验设计法往往造成旋耕机结构笨重、应力分布不合理且动特性不佳。
According to the traditional experimental designing method, the rotary tiller is made very heavy, the stress distribution is improper and the dynamic characteristic of the structure is not very well.
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