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
SLED NEZHDANOVSKOE
For anybody not a secret that such popular transport motonarty little when you need to go s journey through new-fallen loose snow. "How to reduce the specific pressure ka soil, retaining...
RECUMBENT: LET’S HIT THE ROAD!
In the late 70-ies in the press, especially in the journal "modelist-Konstruktor", wrote a lot about velomobiles. Was presented designs of various authors. Some argued that a new form of...