ボレイ級は実際どうなんだろ
https://www.military-forces.net/wp-content/uploads/2017/04/Borei-Class-Submarine.jpg
http://www.hisutton.com/images/Borei_533mm.jpg
https://pbs.twimg.com/media/BxUonHmCQAAR4XK.jpg
http://www.hisutton.com/images/Borei_hatches.jpg
https://drawingdatabase.com/wp-content/uploads/2015/04/Borei-blueprints.jpg