兑水 发表于 2009-9-10 08:31:46

ASTM A 932-2001用瓦特计-安培计-伏特计和薄钢板样品测试电源...

A932/A932M-01 Standard Test Method for Alternating-Current Magnetic Properties of Amorphous Materials at Power Frequencies Using Wattmeter-Ammeter-Voltmeter Method with Sheet Specimens
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