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https://www.ynet.co.il/articles/0,威而鋼 7340,L-5210444,00.html
http://nationalinterest.org/blog/the-buzz/the-us-nuclear-submarine-russia-china-cant-beat-battle-22400?page=2
威而鋼 /article/nuclear-submarine-astute”>http://www.wired.co.uk/article/nuclear-submarine-astute
http://www.independent.co.uk/news/world/europe/russia-nuclear-attack-submarine-yasen-class-tass-kalibr-cruise-missiles-east-europe-severodvinsk-a7667511.html
http://m.hindustantimes.com/india-news/navy-set-to-induct-kalvari-5-things-that-make-building-submarines-complex/story-ijLDj9o0j5Bw53lZ7AnLLM.html
日本藤素 -the-south-china-sea-vietnam-commissions-2-new-attack-submarines/” target=”_blank”>http://thediplomat.com/2017/03/black-holes-in-the-south-china-sea-vietnam-commissions-2-new-attack-submarines/
https://sputniknews.com/military/201702281051117302-sweden-submarine-port/
http://www.upi.com/Defense-News/2017/02/23/Russia-to-lay-down-two-submarines-in-2017/4071487873846/