英文關鍵字
bell
alarm
emergency
helping
accident
policeman
firefighter
urgency
help
people
ladder
equipment
first
aid
kit
axe
warning
alert
rescue
operation
extinguisher
call
hospital
building
fire
exit
police
worker
ambulance
siren
caution
wet
floor
sos
signal
danger
beacon
attention
security
safety
medical
icon
motion
animation
hd
animated