It is proved that among the regular polygons with prime edges, only the regular polygons with Fermat prime edges are constructable with compass and straightedge
The electromagnetic balance head is used for balancing the electric spindle. This paper analyzes the internal structure of the electromagnetic balance head and
The electrical machine manufacturing inChina began early in the tenth of twentiethcentury,but the electrical machine industry hasbeen developed quickly ever sin
Shiheng Coal-fired Power Plant,situated at the foot of thefamous Taishan Mountain and about 100 km southwestof Jinan,the capital of Shandong Province,is a major
Soon after the founding of the Electric Power Construc-tion Research Institute (EPCRI),the Welding Engineer-ing Division (WED) was established in 1958,in order