機器
asian
building
business
button
check
check sheet
computer
construction
consult
contractor
control
control panel
danger
electrical
electrician
electricity
engineer
engineering
equipment
factory
hardhat
helmet
industrial
industry
job
maintenance
maker
mechanic
monitor
occupation
panel
people
plant
production
professional
repair
room
safety
safety first
service
system
team
technician
trainer
training
work
worker
working
young