3 ms·
To be fair, it probably isn't the easy approach to drill so thin. Paradoxically (or not), the bigger ones are less of a hassle to manage as you dig deeper.
by K0SM0S 7y ago
To be fair, it probably isn't the easy approach to drill so thin. Paradoxically (or not), the bigger ones are less of a hassle to manage as you dig deeper.
- Andrew_nenakhov 7y agoKola Borehole diameter is just 23cm