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jan 7, 1911 - 无梁楼盖结构

Description:

1911 年:上海新怡和纱厂麻袋车间采用四层无梁楼盖结构(钢筋加固),突破传统楼层设计

Added to timeline:

Date:

jan 7, 1911
Now
~ 115 years ago