Dimensions of uncoated ring cores of magnetic oxides 磁性氧化铁的未涂覆环形铁芯尺寸
2.
Standard test method for alternating - current magnetic properties of toroidal core specimens using the voltmeter - ammeter - wattmeter method 使用伏特计-电流计-瓦特计方法测试环形铁芯试样交流磁性能的标准试验方法