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
MECHANICAL HORSE “SCARCE”
This mini-tractor, Y. V. BALABIN, Amateur designer from Moscow city Lotoshino, built from what was found in a garage at home, with friends, in a scrap yard. However, "Scarce" (as he...
DUST AND DIRT
Before painting the ceiling during the repair of the apartment it is usually carefully cleaned of previous coatings, and all around, usually covered that off. To avoid unnecessary dirt...