機器
alarm
andon
automated
automation
belt
bulb
business
color
communication
control
conveyor
danger
electric
electrical
electricity
emergency
equipment
error
fabrication
factory
failure
fault
green
indicator
industrial
industry
lamp
led
light
line
machinery
making
manufacture
manufacturing
plant
process
production
red
safety
security
signal
signaling
stack
technology
tower
warning
workshop
yellow