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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Electrical rocket engine is a new type of space propulsion system.

电火箭发动机是一种新型的空间推进装置。

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Electrical rocket engine is a new type of space propulsion system.

电火箭发动机是一种新型的空间推进装置。

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