英文關鍵字
automatic
button
changing
closeup
connect
control
controlling
device
electronic
engineer
equipment
factory
finger
hand
handle
human
indicator
industrial
industry
install
knob
left
machine
man
management
managing
manufacture
manufacturing
nozzle
panel
plant
process
production
right
rotating
system
technician
work
worker
working
workman
workplace
workshop