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上海标准件二厂（简称上海标二）的螺纹毛坯直径计算方法（详见贵刊１９９７年第１期《辗压螺纹毛坯直径计算》一文）多年来一直用于计算所有对称圆柱普通螺纹，新近笔者对其是否能用于计算ＭＪ螺纹毛坯直径作了验证，得出的结论是：上海标二的计算式也适用于计算ＭＪ螺纹...
For many years, it has been used to calculate all common symmetrical cylindrical threads, and recently, the method of calculating the diameter of a blank of a screw thread at Shanghai Standard Parts Factory (referred to as Shanghai Standard 2) (for details, see your article No. 1 of 1997, “Calculation of Rolled Thread Blank Diameter” The author whether it can be used to calculate the diameter of the MJ screw blank has been verified, the conclusion is: Shanghai standard two formulas also apply to calculate the MJ ...