英文關鍵字
blue
business
chemical
chemistry
compressor
construction
energy
engineer
engineering
environment
equipment
factory
fuel
gas
gasoline
helmet
industrial
industry
man
manufacturing
metal
natural
oil
outdoor
outside
petrochemical
petroleum
pipe
pipeline
plant
pollution
power
processing
production
pump
refinery
silver
sky
station
steel
storage
structure
supply
tank
technology
tower
tube
valve
white
work