What is the difference between a trunking and a bridge in a weak construction?
I would like to talk about the hope that useful
The bridge is taken once the equipment of the trunking is the secondary equipment
Eight or six no less, the first good fire retardant pipe on the line, the box can be opened after the slot
You are not just to participate in the construction of the work, for the electrical construction to have a certain degree of expertise and related requirements, if you write a detailed request, there are several pages of A4 paper. Not just a straight line of protection tube, there are 90 degrees turn the tube laying. The connection between the tube and the tube, and so on to be used.
