Brief introduction: SWFL apply electromagn etic induction principle, and the amplified high frequency signal is put out through inductor .
用途与简介：本机是利用电磁感应的原理，高频信号经放大由感应线圈输出。
Brief introduction: SWFL apply electromagn etic induction principle, and the amplified high frequency signal is put out through inductor .
用途与简介：本机是利用电磁感应的原理，高频信号经放大由感应线圈输出。
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