For different requirements on roundness in standards, the articles raises roundness measurements and effective measurements to decrease roundness under different standards.
针对不同标准对椭圆度的要求，提出了在不同标准条件下椭圆度的测量方法以及降低椭圆度的有效途径。
For different requirements on roundness in standards, the articles raises roundness measurements and effective measurements to decrease roundness under different standards.
针对不同标准对椭圆度的要求，提出了在不同标准条件下椭圆度的测量方法以及降低椭圆度的有效途径。
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