What coil do not occur now in our everyday life and tape, and fishing, typewriter and film projector and all have one awkward feature: they are wound — tends to unwind. For all of them a simple and reliable latch will serve kolejno of underwear elastic: soft and wide, it does not give content to unwind the coil.
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In 1933 A. N. Tupolev proposed to make the Soviet analogue of "Martin". He undertook this task, but decided it differently. His ANT-40 in no way resembled an American bomber. For maximum...
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This is an interesting and at the same time very simple machine, which we want to tell you today, already mentioned in the ninth issue of our journal in 1974 (see the essay "And we in...
