Drilling machine 63 drill bit drilled how to get ah Thank you
Did not drill in place, that is, did not drill into the bottom of the cement stabilized base
Drilling refers to the use of drill bits in the physical material processing hole on the operation.
3. not health period, must be health after the core can be sampled, otherwise the cement can not reach the strength, can not make gravel stick.
2. Drill to the bottom, and can not mention the drill, the core of all scattered, can not form a whole, indicating that the cement dose is small, the construction unit cut corners.
The control of the position accuracy of the borehole is essentially the control of the correct position of the drill bit and the workpiece during the drilling process
