In recent days, we have test drilled with our self-manufactured BT56, a thin-walled drill bit with a splittable core pipe, for deep exploration holes. Nuclear feather spring is in the system.
Thin-walled drill bit for deep exploration holes
In recent days, we have test drilled with our self-manufactured BT56, a thin-walled drill bit with a splittable core pipe, for deep exploration holes. Nuclear feather spring is in the system.