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.
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“DESNA” WITH A MOTOR
For my moped, I chose a folding bicycle "Desna-2" model B-849 with reduced wheels (20 X 1.75). To install a motor on it, I made some modifications.
I reinforced the frame: I welded an...
ELLIPSE-PANTOGRAPH
In the modeling practice is often necessary for the creation of ellipses of various sizes, with different ratios of semi-axes. There are several ways of constructing such figures. But...