機器
auger
bore
business
car
climate
concrete
construction
deep
desert
dig
dirt
drill
drilling
earth
energy
engineering
equipment
exploration
field
gas
geology
geothermal
ground
hole
industrial
industry
land
machinery
mechanical
middle
natural
petroleum
pile
pipe
platform
power
rig
sand
scarcity
sky
soil
steel
string
technology
truck
underground
water
well
work