機器
advantage
barrel
black
bolt
business
chink
construction
control
craft
crude
donkey
drilling
ecology
economy
energy
extract
extracting
extraction
facility
flange
fuel
gas
gold
income
industrial
industry
joint
latch
mineral
money
oil
oil industry
pipe
pipework
power
production
profit
pump
pump jack
raw
regulator
rich
russia
storage
technology
tool
unit
well
work