機器
accident
alert
automatic
aware
careful
caught
caution
centre
climb
closeup
danger
dead
electric
elevator
escalator
floor
forbidden
gear
handle
handrail
help
hold
injury
ladder
leg
lift
mall
metal
motion
move
pictograph
public
risk
safe
shopping
shredded
stairs
stairway
station
steel
steps
subway
transport
up
victim
walkway
wrong