clothing
device
dirty
electric
electrician
employment
engine
engineer
equipment
factory
foreman
hand
happy
hard
hat
heavy
helmet
indoors
industry
job
labor
laborer
machining
man
mechanic
men
operator
people
person
plant
portrait
power
professional
protection
protective
repair
repairer
safety
site
smile
smiling
spanner
station
technology
turbine
work
worker
workman
wrench