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
INDISPENSABLE IN THE COURTYARD
Continue the story of machines and mechanisms, built by V. A. VERBELEN—Amateur designer from the village of Zelenchukskaya, Karachayevo-Cherkess Republic. Publications "walk-behind —...
“MISTRESS” IN THE TAIL
The strongest naval power in the world, Britain, is not too actively involved in the "submarine race". This is quite understandable: "mistress of the seas" and so possessed in the oceans...
