機器
business
connector
control
cubes
economy
energy
equipment
erra
facility
field
finance
flange
flow
fossil
fuel
gas
gas industry
gasoline
generation
green
hand
head
industry
man
metal
natural
nature
oil
oil industry
oil well
petroleum
pipe
pipeline
power
power generation
production
pump
regulator
resource
supply
technology
text
the northern regions of alaska
unit
valve
well
wellhead
white
work