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116问答网 > 机械设计标注规范：沉孔标注要怎么标注？

机械设计标注规范：沉孔标注要怎么标注？

2025-03-16 02:32:00

推荐回答（3个）

回答1：

这样标注属于简化画法，在国标《GB/T 4458.4-2003 机械制图尺寸注法》中的附录A中有详细的列表说明：此为两个直径4的通孔，惚平直径8，深5

回答2：

我都是这样标注的，难道有问题吗？

回答3：

2-D8只需标注D8，否则会与前面的2-D4有歧义。

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