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What You'll Learn: What will make up the future of rocket-propulsion systems!
你将学习：火箭推进系统的未来走向。
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Solid rocket motor design is a complicated systems engineering.
固体火箭发动机设计是一项复杂的系统工程。
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Solid rocket motor design is a complicated systems engineering.
固体火箭发动机设计是一项复杂的系统工程。
youdao