主要介绍了内屏蔽铁路数字信号电缆的设计、生产工艺要点，并结合生产实践讨论了如何进行质量控制。
The design and manufacturing key points of internal shielded railway digital signal cable are introduced, and combining with production practice, the quality control measures are discussed.
结合工程实践，全面阐述了SBS改性沥青砼上面层施工中原材料检测、配合比设计、施工工艺等控制要点。
Combined with the construction practice, the paper discussed the raw materials detection, mixture ratio design and construction technology of SBS modified bitumen concrete surface construction.
通过沥青上面层几种结构类型的比较，分析了各自的特点，并结合实践叙述了SAC - 13的配合比设计与施工控制要点。
Compared with several bitumen surface structure types, the paper analyzes its characteristics, and introduces the mixture design and construction control points of SAC-13.
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