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Bi awọn ọja Itanna ni ọja ti o tẹẹrẹ, okun ti o ni ibamu, ohun elo pataki fun awọn ọja itanna, ti n tinrin ati tinrin. Pẹlu fere ọdun 20 ti ikojọpọ ikojọpọ ni imọ-ẹrọ oogbin kan, iwọn ila ti o dara julọ ti a ṣe ni 0.011mm, eyiti o sunmọ ọkan-mẹdogun ti irun eniyan. To produce such a wire with fine diameter, we need to confront with great difficulties in drawing and painting of copper conductor. Ultra-fine enameled copper wire is our best-selling products in our target market.