Conservation of angular momentum, moment of inertia, parallel axis theorem.
角动量守恒，惯量，平行轴原理。
A new measuring instrument of rotational inertia has been devised by the fixed - axis rotation principle and parallel axis theorem of compound pendulum.
利用复摆定轴转动原理和刚体平行轴定理设计的一种新型转动惯量测定仪。
Parallel axis theorem and Knig theorem are deduced from the two laws of rotation.
由两个转动定律导出了平行轴定理和柯尼希定理。
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