The surface of the steel parts is black and treated, and it is also known as blue. The principle is ...
The chemical anchor is a new type of anchor that occurs after the expansion anchor, is fixed by a sp...
The wedge anchor has no higher requirements for concrete voids, and it is easy to install, and the p...
The nut is the nut, screwed with bolts or screws together for fastening, all of which must be used b...