目录
修订履历 .................................................3
1. 介紹 ...............................................4
1.1 目的 ...................................................4
1.2 範圍 ...................................................4
2. 螺牙......................................................8
2.1 定义 ..................................................6
2.2 分类 ...................................................8
2.3 精度等级 ...............................................8
2.4 螺纹标注 ...............................................9
2.5 差不多尺寸 ...........................................10
3. 铝合金.............................................10