機器
air
aircraft
airline
airplane
airport
attendant
aviation
business
cabin
danger
direction
door
doorway
emergency
escape
exit
flight
fly
fuselage
help
information
inside
jet
liner
metal
nobody
open
outdoors
outside
passenger
pilot
plane
protection
red
safety
seat
security
sign
sky
slide
symbol
transport
transportation
travel
view
warning
white
window