英文關鍵字
background
board
building
concept
corridor
danger
direction
door
doorway
emergency
entrance
escape
evacuate
evacuation
exit
fire
flashing
flickering
glow
glowing
green
guidance
guide
help
house
icon
indoor
information
light
man
modern
notice
office
run
safety
secret
security
sign
signboard
symbol
technology
underground
urgency
warning
way