機器
colleague
automation
building
business
construction
control
development
employee
engine
engineer
engineering
equipment
factory
foreman
hardhat
heavy
helmet
indoors
industrial
industry
job
machinery
man
manufacture
manufacturing
mechanic
mechanical
metal
metalwork
occupation
operator
plant
production
professional
project
protection
radioactive
safety
service
steel
technician
technology
transceiver
work
worker
workplace
workshop
young