機器
bedrock
bit
bore
borewell
boring
cooling down
deep
dig
dirt
dirty
drill
drill rig
drilling
dugging
earth
engineering
equipment
flow
geology
ground
heavy machinery
hot
industry
mud
muddy
operate
pounder
puddle
rig
rock
rotary drillers
soil
surface
truck
vehicle
vertical
water
water source
water supply
well
well casing
well drilling
well pump
wet
woker
work