Usoro etching bụ usoro a na-ahụkarị taa. A na-ejikarị ya eme ihe maka etching metal. Bọdụ mgbasa ozi anyị na-ahụkarị, ahịrị PCB, ogwe ebuli elu, uko ụlọ igwe anaghị agba nchara, wdg, na-ejikarị usoro etching eme ihe na mmepụta ha. N'ikwu okwu n'ozuzu, dịka ụdị nke ...
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