機器
barrel
bore
borehole
business
construction
crude
derrick
drill
drilling
earth
ecology
energy
engineering
environment
equipment
exploration
extraction
field
fossil
foundation
fuel
gas
gasoline
generation
geology
ground
hole
hydraulic
industrial
industry
machinery
metal
mining
natural
oil
outdoors
petroleum
pipe
pipeline
power
production
pump
rig
sky
steel
technology
water
well
work