液面计及其它长颈设备口应使用适当尺寸的条棒进行加固以防止设备口挠矩。
Nozzles for level gauge and other long projection nozzles shall be reinforced by bars of suitable size to resist bending moment on nozzles.
利用动量矩定理推导出带挠性伸展附件航天器的动力学方程。
The attitude dynamic equations of a spacecraft with flexible appendages are obtained by using the momentum theorem.
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