YOUTUBE - Drachinifel 搬运不易,还请大家多多充电支持加粉丝群看独家视频 HMS X1 - Optimal Sub or Sub Optimal 今天,我们来了解一下间战期第一艘“巡洋舰”潜艇及其性能。 Today we take a look at the first inter-war 'cruiser' submarine and its capabilities....