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由交通部公路科学研究所、重庆公路科学研究所、航空航天部青云仪器厂、天津建筑仪器厂共同完成的“七·五”国家重点科技攻关项目:GBY 1型智能钢筋保护层测试仪的研制及应用技术研究;GXY 1型钢筋锈蚀测量仪的研制及应用技术研究;HJY 1型结构混凝土绝对应力检测装置及应用技术研究,于1991年2月8日通过国家级技术鉴定.与会专家一致认为:三种仪器设备技术先进,专题整体水平达到当代国际先进水平.
The key national science and technology project of the “Seventh Five-year Plan” jointly completed by the Highway Science Research Institute under the Ministry of Communications, Chongqing Highway Science Research Institute, Qingyun Instrument Factory of the Ministry of Aeronautics and Astronautics and Tianjin Construction Instrument Factory: Development of GBY 1 Intelligent Reinforced Barrier Tester And application of technology research; GXY 1-type steel corrosion measuring instrument research and application of technology research; HJY 1-type structural concrete absolute stress testing device and application technology research, passed the national technical appraisal on February 8, 1991. The experts agreed that : Three kinds of instruments and equipment are advanced in technology, the overall level of the topic reaches the contemporary international advanced level.