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这里所用的滚轴的滚珠数量是非固定的,他取决于弯曲的角度。
The mandrel used here is flexible with a number of balls and with its front end put far foard in the bend.
youdao
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这里所用的滚轴的滚珠数量是非固定的,他取决于弯曲的角度。
The mandrel used here is flexible with a number of balls and with its front end put far foard in the bend.
youdao