Threads and profiles are stronger, consistently accurate and there is no swarf.
滾絲軋輥方法更有力, 精度穩(wěn)定,無(wú)屑.
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The annular swarf carrying velocity reduced with the increase of hole deviation angle and swarf size.
銑屑的環(huán)空返出率隨著井眼傾角、銑屑尺寸的增大呈下降趨勢(shì).
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