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
ANTI-AIRCRAFT TANKS OF THE WEHRMACHT
The rapid development of aviation during the period between the world wars led to the fact that the plane has been regarded as an effective tool of warfare. Already the experience of the...
ELECTRONICA — TREE
Kit electronic Christmas decorations from four independent devices developed and produced by the student of 9th class member directorship radio children's Palace of creativity from the...