英文關鍵字
alarm
alert
assistance
attention
background
black
button
cancel
caution
control
danger
dark
disconnect
dolly
electrical
emergency
factory
fire
help
industrial
industry
interrupt
key
lamp
light
machine
mechanical
off
panic
plastic
point
power
press
push
red
rotating
rotation
round
safety
security
service
sign
signal
siren
slider
start
stop
suspend
switch
technical
technology
urgency
warning
work
yellow