Ẹyẹ ọsin jẹ gbogbogbo ti okun irin to gaju, okun irin carbon kekere, irin alagbara irin alurinmorin, awọn abuda rẹ lẹwa, ina, kika, rọrun lati fipamọ.Itọju ile ẹyẹ ọsin ni gbogbogbo: galvanizing tutu, galvanizing gbona, spraying, dipping, chrome plating, nickel platin...
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