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
TERRIBLE, BUT NOT THE SHOOTER
These missiles were never used in combat. Nevertheless, they played a significant role in the balance of power between opposing blocs during the "cold war". The work done in NII-88 in...
RC AEROBATIC
For eight years I worked as a head of the aeromodelling circle at the station of young technicians in the city of Kiselevsk of the Kemerovo region. Himself in his spare time build a...
