In the practice of the house master often there are cases associated with loosening or tightening of screws of large diameter. Without the “powerful” screwdriver not to do. Equip her with a pen, as shown and work with it will be much easier.
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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...
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— Go to Nizhneudinsk — said to me in the Irkutsk regional Committee of the Komsomol. — Where the station Director is an enthusiast of invention, teaches kids to experiment. We hold...
