英文關鍵字
air
building
business
cement
chemical
chimney
climate
concrete
construction
conveyor
ecology
emission
energy
engineering
environment
environmental
facility
factory
frame
framing
fuel
gas
gasoline
gauge
global
hangar
industrial
industry
light
manufactory
manufacture
manufacturing
metal
modern
oil
petrochemical
pipe
pipes
plant
pollution
power
production
refinery
sky
smog
smoke
solutions
steel
storage
structure
technology
toxic
tube
warehouse
work
workplace