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
HACKSAW-THE DUO
Friends gave me a small bench set in wooden box, the kit which included the hacksaw with custom shortened paintings. When they are worn out, replacing them is not found. Helped me an...
THE FIRST SWALLOW
Guided missile "air — air" RS-1-U. In the late 1940-ies the main Soviet fighter-interceptor was an aircraft cannon. They can be used effectively to strike aircraft at distances not...