兑水 发表于 2009-9-10 07:54:33

ASTM A 912-2004 用万用表环形样品法测试非晶材料在电频率...

A912/A912M-04 Standard Test Method for Alternating-Current Magnetic Properties of Amorphous Materials at Power Frequencies Using Wattmeter-Ammeter-Voltmeter Method with Toroidal Specimens
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