機器
accident
alarm
alert
assistance
background
botton
button
buttons
cancel
concept
control
danger
electric
electrical
emergency
equipment
factory
hand
help
icon
industrial
industry
isolated
key
off
panel
panic
power
press
problems
push
red
retro
safety
security
sign
signal
start
stop
switch
symbol
system
technical
technology
warning
white
work
worker
yellow