“回转器”用英语怎么说？

角动量守恒定律,可以用回转器来演示.The law of conservation of angular momentum may be demonstrated with a gyroscope.本文叙述应用回转器的振荡电路的原理与实践.The principle and the practice of an oscillation circuit using a gyrator are discussed.运用回转器—电容模型可以很...