This paper presents the development of the liquid propellant rocket engine technology from the viewpoint of combustion chamber pressure, thrust level and power cycle.

本文从燃烧室压力、系统工作循环方式以及最大推力三个方面叙述了世界各国液体火箭发动机的技术水平。

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By using the motion equations of constant thrust maneuver, there is no limit on the thrust-level and no restraints on the relative distance when used in spacecraft rendezvous.

应用常推力作用下的质心运动方程，对机动推力的量值没有限制；在航天器交会应用中，对相对距离也无要求。

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"That was a group of people who had a good track record of payment and pretty low level of arrears, thrust into a position where they are now is significant arrears, " said Mr Forbes.

BBC: Roofs