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
IMPROVEMENT HAND TOOLS IMPACT
When conducting different kinds of work often have to use hand tool percussion: chisel, punch, jumper and others. To eliminate the negative impact response of the impact on a hard work...
WALK ON THE WATER
I live in Siberia, from an early age-hunting, fishing. Our wonderful Siberian. A lot of rivers and lakes. Rich in fish and game. Most of all I love to hunt waterfowl. But to take it is...