Ẹyẹ ọsin jẹ gbogbogbo ti okun irin to gaju, okun irin carbon kekere, alurinmorin waya irin alagbara, eyiti o jẹ ẹwa, iwuwo fẹẹrẹ, kika, rọrun lati fipamọ.Itọju oju ti agọ ẹyẹ ọsin jẹ gbogbogbo: galvanized tutu, galvanized gbona, sokiri, dip, plating chromium, nicke…
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