Last month, Zheng Hehui gave an oral defence of his PhD in civil engineering at Southeast University in Nanjing, China. But Zheng had not written a thesis. Instead, he talked about a product he had ...
Section of the 72-in.dia. Potomac Interceptor sewage line that collapsed on Jan. 19 is excavated; the incident sent up to 300 million gal of untreated wastewater into the Potomac River. February 2, ...
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