機器
adult
bearded
blueprint
chatting
cheerful
control
copy space
discussing
draft
engineer
engineering
factory
foreman
happy
holding
industrial
industry
inspecting
inspection
maintenance
man
manager
manufacturing
mature
mechanic
metalwork
modern
occupation
overalls
people
plan
plant
production
quality
repairman
safety
senior
smiling
supervisor
talking
technician
tour
two
unit
work
worker
workman
workshop
workwear