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(ножь) knife is the subject of katori can rezat.nozhy are blunt, sharp, large, small, they varieties.the battle begins with a knife or with protection against attacking enemy limbs or with instantaneous attack his vital points of the body.under the knife work of art easy means to avoid the requirement of intricate paths, to "play" with a knife in his fingers, throw it from one hand to the other, they make movement without intention to hit the opponent (scare).offensive action, leading to a deep penetrating wound, called "prick." it is most often applied to them in the linear action. they rightly considered the most life-threatening. (парта) parta - the subject of school furniture desk associate with the bench, designed for students in secondary (and sometimes pre-school) education. as a rule, involve the use of the desks at the same time by two students.in modern schools desks replaced by student desks, chairs, set of working with the appropriate seat height chair with a writing and other.school desk erismann was invented in 1870 (wrongly, as the party erismann clearly based on the drawings farner, published in germany 5 years earlier and now she returns to us. (телефон) before the invention of telegraphs (optical and electrical) and phone to send messages over long distances used primitive methods, such as whistle, gong, smoke signals or drums. for example, a shot from a rifle can be heard at a distance of about ten kilometers to the audibility strongly affected by the presence nearby strangers rather loud noises; the signal may be distorted by unauthorized shots. all of these devices were deficient due to the distance the sound dispersion - to transmit a signal over long, it was necessary to make intermediate points on which other feeders signals heard another signal transmitted it to turn on. in 1849-1854 gg. charles bursel, a mechanical engineer and deputy inspector of the paris telegraph, developed the idea of ​​calling. the first principle of sh bursel phone described in his dissertation in 1854, but the practical implementation of telephony it is not reached. sh bursel was also the first to use the word "phone".