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单位：英寸（inch）
| (inch) | dc | d min | h min | h max | a |
|---|---|---|---|---|---|
| 1/4 | 0.625 | 0.281 | 0.051 | 0.08 | 0.219 |
| 5/16 | 0.688 | 0.344 | 0.051 | 0.08 | 0.281 |
| 3/8 | 0.813 | 0.406 | 0.051 | 0.08 | 0.344 |
| 7/16 | 0.922 | 0.469 | 0.051 | 0.08 | 0.406 |
| 1/2 | 1.063 | 0.531 | 0.097 | 0.177 | 0.438 |
| 5/8 | 1.313 | 0.688 | 0.122 | 0.177 | 0.563 |
| 3/4 | 1.469 | 0.813 | 0.122 | 0.177 | 0.656 |
| 7/8 | 1.75 | 0.938 | 0.136 | 0.177 | 0.781 |
| 1 | 2 | 1.125 | 0.136 | 0.177 | 0.875 |
| 1-1/8 | 2.25 | 1.25 | 0.136 | 0.177 | 1 |
| 1-1/4 | 2.5 | 1.375 | 0.136 | 0.177 | 1.094 |
| 1-3/8 | 2.75 | 1.5 | 0.136 | 0.177 | 1.219 |
| 1-1/2 | 3 | 1.625 | 0.136 | 0.177 | 1.313 |
| 1-3/4 | 3.375 | 1.875 | 0.178 | 0.28 | 1.531 |
| 2 | 3.75 | 2.125 | 0.178 | 0.28 | 1.75 |
| 2-1/4 | 4 | 2.375 | 0.24 | 0.34 | 2 |
| 2-1/2 | 4.5 | 2.625 | 0.24 | 0.34 | 2.188 |
| 2-3/4 | 5 | 2.875 | 0.24 | 0.34 | 2.406 |
| 3 | 5.5 | 3.125 | 0.24 | 0.34 | 2.625 |
| 3-1/4 | 6 | 3.375 | 0.24 | 0.34 | 2.875 |
| 3-1/2 | 6.5 | 3.625 | 0.24 | 0.34 | 3.063 |
| 3-3/4 | 7 | 3.875 | 0.24 | 0.34 | 3.313 |
| 4 | 7.5 | 4.125 | 0.24 | 0.34 | 3.5 |
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