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MH320 Portable Hardness Tester
| Type of Impact Device | Distance of center of the two indentations | Distance of center of the indentation to sample edge |
| Not less than (mm) | Not less than (mm) | |
| D、DC | 3 | 5 |
| DL | 3 | 5 |
| D+15 | 3 | 5 |
| G | 4 | 8 |
| E | 3 | 5 |
| C | 2 | 4 |