機器
alarm
alert
attention
automatic
background
black
business
button
control
danger
device
display
electric
electrical
emergency
engine
equipment
factory
fence
industrial
industry
instrument
manufacturing
monitor
panel
panic
plant
power
press
push
red
room
safety
security
ship
sign
start
stop
switch
switchgear
symbol
tech
technical
technology
touch
warning
white
work
yellow