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R-31型导弹试验艇667AM型为了能够与美国海军的“北极星”导弹核潜艇相对抗,苏联于20世纪60年代制定了短期大规模建造计划,667A
Model R-31 Test Vessel 667AM In order to be able to confront the U.S. Navy’s Polaris missile submarine, the Soviet Union made a short-term large-scale construction plan in the 1960s. The 667A