Length | Drilled hole interval | Initial point | Final point |
0.25 | 0.04 | 0.04 | 0.20 |
0.50 | 0.08 | 0.08 | 0.40 |
1.00 | 0.16 | 0.16 | 0.80 |
2.00 | 0.32 | 0.32 | 1.60 |
3.00 | 0.48 | 0.48 | 2.40 |