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1概述第二次世界大战结束后,欧洲诸国为重新建设,急需大量建筑材料,其中包括建筑用钢材。在资源极度匮乏的条件下,对于混凝土结构所用
1 General After the end of World War II, a great deal of building materials were urgently needed for the reconstruction of European countries, including steel for construction purposes. Extremely scarce resources in the conditions for the concrete structure used