1.Dimensions of toroids made of magnetic oxides or iron powder
磁性氧化物或铁粉环形磁心的尺寸
2.Approximate calculation of coefficient toroids self-inductance
一种螺绕环自感系数的近似计算
3.measurement of permeability and q - factor of ferrite toroids
铁氧体环的导磁率及其品质因数的测量