引用・参考文献 https://www.gruppofalchi.com/files/Profile-Publications-Aircraft-101---Boeing-B-29-Superfortress.pdfhttps://www.quora.com/How-much-50-ammo-did-a-WWII-B-17-or-B-24-carry-Did-some-gunnery-positions-stock-more-than-othershttps://www.quora.com/How-many-seconds-of-firing-time-did-machine-gunners-in-B-17s-and-B-24s-have-during-bombing-missions-in-World-War-II
http://www.nicovideo.jp/watch/sm46147123
