Main products include ductile manhole covers, composite resin covers, drill rod cement covers, galvanized steel grating, polymer alloy covers, cast iron manhole covers, flower bar, cast iron pipe.

主营产品有球墨井盖、复合树脂井盖、钢钎水泥井盖、镀锌钢格板、合金高分子井盖、球墨铸铁井盖、铸铁井盖、花栏、铸铁管等。

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This paper mainly introduces the research on the substitution of Aluminium bar by rare earth, magnesium and silica alloy on the process of chemical capping to rimmed steel during casting.

文中主要研究稀土镁硅合金替代铝条应用于沸腾钢浇注的化学封顶工艺。

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Alloy steel, die steel, tool steel. Processing materials for the user model and the cold drawing hot rolled round steel bar. Can be long-term stock.

合金钢，模具钢，工具钢。可为用户加工生产材质型号热轧圆钢及冷拉圆钢。并可长期现货供应。

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