新型运载火箭将由飞船助推火箭、燃料箱、主发动机以及月球火箭发动机组成。

They would be built from shuttle booster rockets, fuel tanks and main engines, as well as moon rocket engines.

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在燃料电池发动机和镍氢电池组组成的混合动力系统中，提出了通过一个双向电源变换器实现双电源输出功率混合的控制方法。

For hybrid power system composed of a fuel cell engine and a group of Ni-H batteries, a new control method with a bi-directional power converter is proposed.

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介绍了双燃料发动机的工作特点 ，燃料供给系的组成、工作原理 ，以及如何对其进行正确使用及保养。

This article introduces working features, composition of the fuel-supply system and the working principle of the dual-fuel engine and how to use and maintain correctly.

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