Lightning mine in the design of the mine what is the best use of materials?
It is best to use galvanized flat iron. But there is a requirement to ground resistance must be considered 4 ohm qualified.
According to their own engineering experience, more than 10mm galvanized round steel, or more than 30x3 galvanized flat steel with the most! The
If it is made with the galvanized steel bar is economical and practical if it is dark on the use of the floor directly through the pillars of the column in the lap welded to the solid
