機器
environmental
adult
architect
automotive
blue
building
business
center
chemical
computer
construction
control
design
dioxide
distillery
drawing
energy
engineer
engineering
environment
equipment
factory
factory worker
fuel
fuel storage
fuel tanks
gas
gas industry
gas refinery
gasoline
glasses
global warming
handsome
helmet
industrial
industrial plant
industrial worker
industry
instrument
iron
laborer
maintenance
male
man
manager
manufacturing
mechanic
mechanical
metal
mill
oil
oil refinery
oil worker
person
petrochemical
pipe
pipelines
pipes
plant
pollution
power
production
professional
project
protection
quality
refinery
room
safety
security
service
site
steel
table
technology
tool
toxic
well
work
worker
workman