Highway technical classification 公路技术等级
Highway management classification 公路管理等级
Code of highway technical classification 公路技术等级代码
The no-supporting pier steel arch frame is seldom used in arch bridges construction, moreover, their spans were less than 100 m, and their highway classification and technical requirement were not strict.
采用无支墩钢拱架施工拱桥为数不多，且其跨度均在百米以内，公路等级、技术要求均较低。
参考来源 - 大跨度可调式无支墩钢拱架施工混凝土拱桥技术·2,447,543篇论文数据，部分数据来源于NoteExpress
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