機器
auger
bore
borehole
borehole drilling
boring
business
close up
closeup
construction
deep
dig
dirt
drill
drilling
drilling pipe
drilling rig
drinking
earth
energy
engineering
environment
equipment
geological
geology
geothermal
ground
ground water
heating
hole
house
industry
machinery
metal
mud
muddy water
pipe
pit
power
pump
renewable
rig
rotary
steel
truck
water
water well
well