📁 工程
This category is where information related to the science and practice of civil engineering goes. All businesses that provide civil engineering services as their primary goal go into Business/Industries/Engineering/Civil. Products and services of interest to the civil engineering community will be listed in the interim in Products and Services, but will be moved to a Business category soon.
子分类
条目 (1+)
Michigan Ship Canal
http://quod.lib.umich.edu/cgi/t/text/pageviewer-idx?c=moa;cc=moa;rgn=full+text;idno=AJQ1217.0001.001;didno=AJQ1217.0001.001;view=image;seq=00000001