求助:此硅钢片用于何处? 我想采购

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请问该硅钢片是用在何种变压器上面的,用与那个领域?我们老大今天突然把这个东西给我了,要做这类的产品.可我连这是什么东东都不知道,请各位大虾帮忙.大小约为83×57mm.
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