Table 1.
The field sizes used for each circular cone diameter
| Circular cone diameter (mm) | Field sizes (mm) |
|---|---|
| 5, 7.5, 10 | 30 × 30 |
| 12.5, 15, 17.5, 20 | 40 × 40 |
| 25, 30 | 50 × 50 |
| 35, 40, 50 | 60 × 60 |
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