A history of Self-Drilling Anchor (Game of Thrones version)

The story happen in Westeros is very popular in the worldwide. In the history of self drilling anchor bolting developing, same thing is happening. Let’s take a look at these real groups. The founder and former ruler: Atlas copco, first applied SDA Hollow Bars in railways in 1980’s. Basic structure & function: Rope Thread, Tensile.. read more →