钻头角度规

bailer, valve drill bit (valve auger)

drill rig

hammer drill mining

truck-mounted drill rig【机】;truck-mounted rig【机】;wagon drill【机】

all geared upright drill

rotary drill bit (rotary boring head) deep drilling

auger bit【机】[专业]杆式取土样器\nearth auger【建】;fluted twist drill【机】;spiral drill【机】

diamond drill