機器
assembly
automated
concentration
control
employee
engineer
engineering
expertise
facility
factory
flame
foreman
hard hat
hardhat
heat
heavy
helmet
inspector
job
labor
laborer
labour
machinery
maintenance
manufacture
manufacturing
material
mechanic
mechanical
occupation
power
processing
production
professional
protection
quality
repairman
safety
service
skill
skilled
technician
warehouse
worker
working
workman
workplace
workshop