Ultrahigh voltage power transmission refers to the use of 500 kV - 1000 kV voltage level to transport electrical energy. If the 220 kV transmission index is 100···

Sc stands for thick-walled steel pipe, that is, welded steel pipe commonly seen by everyone, which can also be called black steel pipe, which is a galvanized st···

1. What kinds of wires and cables are commonly used according to their uses?A: According to the use can be divided into bare wire, insulated wire, heat-resistan···

The national standard wire is the wire produced in full accordance with the national standard. General household, common wires are standard specifications of pe···

With the rapid development of China's economy, "Internet +" is like a strong hurricane, almost swept all walks of life overnight, which will usher in unlimited ···