turning difficult to easy
turning difficult to easy
化难为易
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Cylindrical worms are usually worked by formed turning tool or milling cutter. It is inefficient. The tooth shape is difficult to control and the quality is not easy insured.
通常圆柱形蜗杆都是用成型车刀或铣刀加工，效率低而且齿形不易控制，质量也不易保证。
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