Based on 6d rigid body trajectory equation, the spin-number formula of the projectile was deduced, by which the spin-number can be calculated.
基于旋转稳定弹丸的6d刚体弹道方程，导出了弹丸转圈数公式，可对弹丸圈数进行准确计算。
Based on 6d rigid body trajectory equation, the spin-number formula of the projectile was deduced, by which the spin-number can be calculated.
基于旋转稳定弹丸的6d刚体弹道方程，导出了弹丸转圈数公式，可对弹丸圈数进行准确计算。
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