Cast in many industrial products have long been used mortgages (anchor) bolts with special heads, such that not only pull, but rotate can’t.
With the advent of high strength composite self-hardening compositions that bolt you can “lay” in the body of the finished product (plastic or metal) and making it pre-nest, and then simonaityte.
Recommend to read
Express wood burning
Wood burning is very often used for finishing wooden items. Even when this operation is done with a special tool—a pyrograph—it is very labor-intensive, especially when applying various...
BACKPACK ON WHEELS
Our housewives, especially elderly ones, have long appreciated the shopping cart — a small two-wheeled cart with a bag attached to its frame, resembling a tourist backpack in shape. How...