網址: https://upload.wikimedia.org/wikipedia/commons/thumb/8/8a/011_Aircraft_of_various_airlines_together_at_Narita_Airport,_Japan._Swiss_Air_Lines,_United_Airlines,_Thai_Airways.JPG/330px-011_Aircraft_of_various_airlines_together_at_Narita_Airport,_Japan._Swiss_Air_Lines,_United_Airlines,_Thai_Airways.JPG
網址2: https://ja.wikipedia.org/wiki/商用航空
