the invention u043eu0442u043du043eu0441u0438u0442u0441u00a0 to demonstration instrument of resistance materials and u043fu043eu0437u0432u043eu043bu00a0u0435u0442 expand the range of task by demonstrating the loss of stable u0441u0442u0435u0440u0436u043du00a0 guests in the plane of greatest stiffness.when placing the goods 20 on 18 u043fu043eu0441u043bu0435u0434u043du00a0u00a0, u043fu0435u0440u0435u043cu0435u0449u0430u00a0u0441u044c on u043du0430u043fu0440u0430u0432u043bu00a0u044eu0449u0438u043c 2 acts on the rod 3, the hinges of the bracket 6 and placed in it (with removable control unit and u0448u0442u044bu0440u0435u0432u044bu043c striker.the combination u0437u0430u043au0440u0435u043fu043bu0435u043du0438u00a0 u0441u0442u0435u0440u0436u043du00a0 in u0432u0442u0443u043bu043au0435 and last in u043au0440u043eu043du0448u0442u0435u0439u043du0435 u043fu043eu0437u0432u043eu043bu00a0u044eu0442 to u0434u0435u0432u00a0u0442u044c options u0437u0430u0449u0435u043cu043bu0435u043du0438u00a0 u0441u0442u0435u0440u0436u043du00a0, of which six u0441u043bu0443u0447u0430u00a0u0445 rod u0442u0435u0440u00a0u0435u0442 sustainability in terms of minimum stiffness and three u0441u043bu0443u0447u0430u00a0u0445 - in the plane of maximum rigidity. 3).
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