In April 1956, the aviation industry commission of the people's Republic of China was established to lead China's aviation and rocket industry.中国航天史是从1956年二月开始的，当时著名科学家钱学森向中央提出《
physicists attempt to describe the whole of space-time, including all matter and energy and events which occur, as a single system corresponding to a mathematical scientific theory which describes the
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