機器
activity
background
building
business
chemical
chemistry
commerce
construction
crane
development
diesel
economy
energy
engineer
engineering
environment
equipment
factory
fuel
gas
gasoline
greenpeace
industrial
industry
installation
iron
lighting
logistics
manufacturing
metal
oil
petrochemical
petroleum
pipe
pipeline
plant
power
production
stack
steam
structure
supply
tank
technical
technology
tower
transport
transportation
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