英文關鍵字
access
closeup
door
doorway
electromagnetic
engineer
entering
equipment
factory
foreman
gate
hall
hatch
industrial
industry
inside
inspector
job
lock
machine
man
manager
manufactory
manufacturing
manufature
mechanic
metal
open
opening
pass
passage
passing
plant
production
protection
provision
room
safety
secret
security
system
technician
technology
view
walk
work
worker
workman
workplace
workshop