Threads and profiles are stronger, consistently accurate and there is no swarf.
滚丝轧辊方法更有力, 精度稳定,无屑.
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The annular swarf carrying velocity reduced with the increase of hole deviation angle and swarf size.
铣屑的环空返出率随着井眼倾角、铣屑尺寸的增大呈下降趋势.
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