The optimism design of thickness for this cladding material is helpful to improve the performance of thermal shock resistance.
对硬质覆层材料的厚度进行优化设计有助于其抗热震性能的提高。
A top design official at the time, Boris Chertok, wrote in his memoirs that "Judging by modern standards of rockets reliability, we had no reasons for optimism by April 1961."
一位高级设计师BorisChertok在他的回忆录中写到“以现代火箭可用性来评估的话，我们实在没有理由对1961年4月那次发射那么乐观。”
A top design official at the time, Boris Chertok, wrote in his memoirs that "Judging by modern standards of rockets reliability, we had no reasons for optimism by April 1961."
一位高级设计师BorisChertok在他的回忆录中写到“以现代火箭可用性来评估的话，我们实在没有理由对1961年4月那次发射那么乐观。”
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