bars
bolt
building
business
connector
control
crane
drilling
ecology
electric
energy
energysecurity
engineering
equipment
facilities
fields
finance
flange
fossils
fuel
gas
gasoline
generation
head
industry
manometer
metal
natural
naturalresources
oil
pipe
pipeline
pipelines
plant
platform
power
production
pump
pumping
refinery
science
sky
station
technology
tower
transportation
ukraine
valve
work
yellow
定額
Gas pipeline and gas industry, gas transmission system. Communications and instruments for a gas pumping station. The gas valve is yellow.の素材 [FY310104277173]
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