天气预报 > 其他 > 1英寸丝锥中径H2标准是多少
1英寸丝锥中径H2标准是多少
更新时间: 2020-09-20 00:00:00  

1英寸的丝锥的螺旋中径标准是ET3;

1英寸的丝锥的先端中径标准是ET4。

1英寸丝锥的大径等于33、249mm,中径等于31、77mm,小径等于30.291mm。

关键词: 英寸 丝锥 h2 标准 多少

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