这样的结构具有中性浮力，使得鹦鹉螺能够靠后推力移动（像枪乌贼一样）。
The result had neutral buoyancy, allowing the animal to move (like squid) by jet propulsion.
并基于某导弹缩比模型进行了实际测试，取得了导弹模型水下发射时发动机推力以及相应的结构壳体应变量等参数。
Practical tests of launching under water have been carried out based on a missile model, and parameters such as driving force of the engine and the structural strain of the model are obtained.
应用有限元方法对某多缸内燃机机体在活塞推力作用下的结构动力响应进行了分析。
The structural dynamic response of a certain multi? cylinder internal combustion engine block is analyzed applying finite element method.
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