Utilization ration of raw material is higher, and waste mater...

原料利用率高，废弃物排放量小。

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This paper introduces the structural design, raw mater ial selection, manufacturing process, property test and quality control method for contact rail protective cover board for Tehran Metro project.

本文介绍了地铁接触轨防护罩的结构设计、原材料选择、制造工艺、性能检测、质量控制等。

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