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DIAMOND CORE DRILL BIT (INTERNATIONAL STANDARD)
| Bit type | Description | Set type of Diamond | Remarks | 
| Wire-line | 
			 dia. 56, 59, 75 and 95, BQ, NQ, HQ  | 
			Impregnated | |
| Couple tube | dia.56, 59, 75, 76, 91, 110, 130 and 150 | Impregnated | |
| Single tube | dia.46,56, 59,75, 91, 110, 130, 150, 171, 223 and 300 | Impregnated |