A thorough presentation of engineering mechanics theory and applications includes some of these topics: Force Vectors;
工程力学理论和应用的彻底的赠送包括一些这些题目︰ 力量矢量；
This problem was exacerbated by gas pressure from the rocket's spin motor and main motor where their force vectors were in opposition.
这一个问题被来自火箭旋转稳定发动机和主发动机的气体加剧，在那里他们的力量矢量对抗。
The conservative force and the gradient of the potential energy are dual vectors.
保守力与势能梯度互为对偶矢量。
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