阻抗(有效值)磁导率
当材料在对称反复磁化条件下激磁时所测得的磁通密度峰值与相应表观磁场强度幅值的比值,其表观磁场强度的幅值是由测得的激磁电流有效值计算求得。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
免费的网站请分享给朋友吧