英文關鍵字
alarm
attention
bright
bulb
caution
color
danger
emergency
equipment
factory
fire
glowing
industrial
industry
lamp
light
lighting
machine
red
safety
security
sign
signal
siren
technology
warning
work
英文關鍵字
alarm
attention
bright
bulb
caution
color
danger
emergency
equipment
factory
fire
glowing
industrial
industry
lamp
light
lighting
machine
red
safety
security
sign
signal
siren
technology
warning
work