松雨霞 发表于 2019-9-6 16:10:09

ASTM A912/A912M − 11 (Reapproved 2019)

Standard Test Method for
Alternating-Current Magnetic Properties of Amorphous
Materials at Power Frequencies Using Wattmeter-Ammeter-
Voltmeter Method with Toroidal Specimens

admin 发表于 2019-9-6 17:01:48

谢谢您的分享,金币已奖励!

hung 发表于 2019-9-9 10:49:55

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