The status quo of production technologies for domestic road asphalt and product quality were introduced together with the progress in polymer modified asphalt.

介绍了国内道路沥青生产技术、产品质量现状及在聚合物改性沥青方面取得的进展。

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Domestic tin industry is at the time of crisis. Domestic tin resources, production, status quo of tin enterprises and their development prospects are analyzed.

我国锡工业已进入危机时刻。本文分析了锡的资源、生产及企业的现状和发展前景。

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The production process of tyre cord steel was presented, and the technical status quo of smelting, refining and continuous casting of tyre cord steel were analyzed by investigation technical data.

通过相关文献资料调研，介绍了帘线钢生产工艺流程及其冶炼、精炼和连铸技术现状，重点分析了帘线钢的质量控制。

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