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根据毛主席关于“人类总得不断地总结经验,有所发现,有所发明,有所创造,有所前进”的伟大教导,我地区学习外地经验,从1967年以来,先后建成了十几座双曲拱桥。这种新结构我们学习得怎样?今后怎样采用?去年四月初带着这些问题,我们调查了我地区九座双曲拱桥,初步了解到伊春地区双曲拱桥的现状,增加了对这种桥的感性认识。
According to Chairman Mao’s great teaching on “human beings always summarize experiences, discoveries, inventions, creation and advancement,” our region has learned a lot about experience in other fields. Since 1967, over a dozen double-double Arch bridge. With these new structures, what have we learned? How to adopt them in the future? With these problems in early April last year, we surveyed nine double-curved arch bridges in our area and got an initial understanding of the current situation of double-curved arch bridges in Yichun, Perceptual knowledge.