fleetsubmarine,anti-submarine

02submarine – principles and design? how does it work?
why america should fear china's submarine fleet
谁心里没点儿粉红的心事呢?
ssbn - fleet ballistic missile submarine
32米!revell 威望 05168 铂金版 1:72 小鲨鱼级美国海军潜艇 新低734.