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1949年8月29日,对原苏联退役上校谢尔盖·达维多夫来说是个永生难忘的日子,就在这一天,他亲手按下了原苏联第一颗原子弹爆炸的主按钮……
On August 29, 1949, an unforgettable day for the former Soviet Union retired Colonel Sergey Davidsov, on this very day he pressed the main button of the first Soviet atomic bomb.