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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School hydrometeorological station
"The school automatic weather station, constructed by students of secondary school No. 5 in the city of Klin, is of technical interest. The precipitation sensor and its registration on the...
ANY CLEAVAGE
be easily treated with sandpaper, if you use this wooden rod of suitable diameter. The operation is performed through wrapped around it a piece of sandpaper required granularity.
