
Old children’s ball cut in half and put on garden shears, protects hands when cutting thorny plants.
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Motorists made electronic blocks of ignition, as a rule, according to the classical scheme consisting of a high voltage source, a storage capacitor and a thyristor key. However, such...
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When using electrical appliances (e.g. electric light), there is an inconvenience: you want to sleep but have to get up to go to the outlet and remove it from the fork. The proposed...