如图所示r1和r2是同种材料厚度相同表面为正方形的导体但r1的尺寸比r2的尺寸大.在两导体上加相同的电压通过两导体的电流方�如图则 Template




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tomski如图所示r1和r2是同种材料厚度相同表面为正方形的导体但r1的尺寸比r2的尺寸大.在两导体上加相同的电压通过两导体的电流方�如图则 coloring