Dr Van Valkenburgh studied 36 living carnivores, ranging from weasels to tigers, to determine the frequency of tooth breakage.
范博士为了得到牙齿断裂频率，研究了36种活的食肉动物——小到鼬鼠，大到老虎。
The tooth end relief is an effective process for double circular arc gear to lighten the shock, lower the meshing noise, and prevent the tooth end from breakage, so as to prolong the service life.
双圆弧齿轮齿端修形是减小啮入冲击、降低传动噪声、避免齿端崩角、提高使用寿命的有效措施。
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