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
STEARMAN PT-13/PT-17/PT-18
In 1933, the designers of the American company "Starman" designed the training aircraft, with a motor 215 l,p, called the "model 70". It was an all-metal biplane with fabric covering,...
BOMB MODELS
Aerial bombs are divided into three types: primary, secondary, and special assignments. The first are high-explosive, fragmentation, armor-piercing, incendiary, and some others, the...
