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
FRENCH INFANTRY TANK
After the First world war, France had the largest tank Park in the world. And the main part of it were the fighting vehicles Renault FT17— without a doubt the best tanks of the last war,...
THE LOCK WILL BE SAFER
The lock bolt is in the mailbox does not always withstand the encroachment of the feeder bullies. Too primitive its form is thin and the iron from which it is made. But if you replace...
