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
AND THE FLOWER DOES NOT WITHER
A persistent problem with houseplants: how not to let them dry out, when you are a long time absent from home? Have some way to ischislyaetsya to the ground was constantly wet. Here's...
GUIDED ANTI-AIRCRAFT MISSILE “WASSERFALL”
In the development of controlled anti-aircraft weapons of Germany during the Second world war, of course, surpassed all other countries. Work in this direction started there quite early...
