其次，针对摆动活塞式发动机的总体结构进行设计。
Next, in view of swings the piston engine overall structure to carry on the design.
IVB级有一个单独摆动发动机来作俯仰和偏航。
The S-IVB stage has its single engine gimbaled in pitch and yaw.
首先，针对摆动发动机的工作原理进行设计与分析。
First, the author aims at the swings engine principle of work to analysis and design.
首先，针对摆动发动机的工作原理进行设计与分析。
First, the author aims at the swings engine principle of work to analysis and design.
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