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单位：英寸（inch）
| (inch) | P | e | k max | k min | dc min | dc max |
|---|---|---|---|---|---|---|
| 1/4 | 28|32 | 0.287 | 0.255 | 0.245 | 0.365 | 0.375 |
| 5/16 | 18|24|32 | 0.362 | 0.323 | 0.313 | 0.457 | 0.469 |
| 3/8 | 16|24|32 | 0.431 | 0.394 | 0.384 | 0.55 | 0.562 |
| 7/16 | 14|20|28 | 0.499 | 0.472 | 0.462 | 0.642 | 0.656 |
| 1/2 | 13|20|28 | 0.571 | 0.515 | 0.505 | 0.735 | 0.75 |
| 9/16 | 12|18|24 | 0.645 | 0.551 | 0.541 | 0.828 | 0.844 |
| 5/8 | 11|18|24 | 0.715 | 0.63 | 0.62 | 0.921 | 0.938 |
| 3/4 | 10|16|20 | 0.86 | 0.787 | 0.777 | 1.107 | 1.125 |
| 7/8 | 9|14|20 | 1 | 0.866 | 0.856 | 1.293 | 1.312 |
| 1 | 8|12|20 | 1.138 | 1.063 | 1.053 | 1.479 | 1.5 |
| 1-1/8 | 7|12|18 | 1.28 | 1.181 | 1.171 | 1.665 | 1.688 |
| 1-1/4 | 7|12|18 | 1.42 | 1.299 | 1.289 | 1.852 | 1.875 |
| 1-3/8 | 6|12|18 | 1.562 | 1.417 | 1.407 | 2.038 | 2.062 |
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