英文關鍵字
architecture
blue
built
business
busy
chimney
clouds
concept
construction
coveralls
energy
engineer
equipment
expert
facility
factory
hardhat
heating
helmet
high
industrial
industrialization
industry
investments
job
looking
man
nature
nspection
occupation
outdoors
petrochemical
plant
pollutant
portrait
power
professional
progress
read
red
report
sky
structure
supervisor
technician
technology
white
worker