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
HERRINGBONE TURN AROUND!
Seven years in our school, works flawlessly simple turntable for Christmas trees; she turns the forest beauty, switch her colorful garlands; it can be used as a kind of bracket for the...
THE SECOND COMING OF THE “HYBRIDS”
The emergence of nuclear submarines dramatically changed the balance of forces at sea, not only between countries but also between classes of ships. Indeed, hunters submarines could...