The products of inertia of the inner or outer gimbal ring may not be equal to zero, if the rings have not been dynamically balanced.

如果陀螺仪的内环或外环没有经过动平衡，就不能认为它们的惯性积等于零。

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Camera gimbal ring with float mount to avoid vibration to the camera. Has a damping effect on floating parts, and permits blur-free photos and movies.

照相机万向架，浮架用作避免振动照相机；浮动零件有一个抑制装置，防止模糊相片和电影。

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