1959 The U.S. first Polaris submarine, George Washington, was launched at Groton in Connecticut.
1959 The U.S. first Polaris submarine, George Washington, was launched at Groton in Connecticut.
美国第一艘北极星潜水艇乔治·华盛顿号在康涅狄格州格罗顿下水。
1959 The U.S. first Polaris submarine, George Washington, was launched at Groton in Connecticut.
美国第一艘北极星潜水艇乔治·华盛顿号在康涅狄格州格罗顿下水。