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不知曾几何时,“0-4-0”、“2-4-2”和“4-4-4”这3组简单的数据开始成为螺纹镀前加工尺寸的代名词,而今它又时常出现在专业会议上,令初闻者费解。据了解,这3组数据最早是企业工艺圈内一种约定俗成的习惯表示方法。每组数据的第1￣3位数字依次表示螺纹的大径、中径和小径,具体
I do not know once upon a time, three simple sets of data, “0-4-0”, “2-4-2” and “4-4-4”, became synonymous with the size of pre-thread plating and are nowadays often found in professional conferences On, so that the news reporters puzzled. It is understood that these three sets of data is the earliest business process within the circle of a common saying. 1 ~ 3 digits of each group of data, in turn, represent the major diameter, the minor diameter and the minor diameter of the thread, specifically