the groove u044du043bu043bu0438u043fu0442u0438u0447u0435u0441u043au0430u00a0 u0430u043du0434u0440u043eu0441u043eu0432u0430 - u0433u0440u0435u0431u0435u043du044eu043au0430, u0441u043eu0434u0435u0440u0436u0430u0449u0430u00a0 cylinder with screw u043fu0440u043eu0444u0438u043bu0438u0440u043eu0432u0430u043du043du044bu043c jutting out on it, including the top u0441u043eu043fu0440u00a0u0436u0435u043du043du0443u044e with trench, step and angle the rise of the spiral line, u043eu0442u043bu0438u0447u0430u044eu0449u0430u00a0u0441u00a0 so that the cavity of the screw and formed in a u043eu0441u0435u0432u043eu043c u0441u043eu043fu0440u00a0u0433u0430u044eu0449u0438u043cu0438u0441u00a0 in average diameter of thread u0434u0432u0443u043cu00a0 on u043bu0443u043eu043au0440u0443u0436u043du043eu0441u0442u00a0u043cu0438,which u0441u043eu0441u0442u0430u0432u043bu00a0u044eu0442 radiuses have one fourth of the step groove in a u043eu0441u0435u0432u043eu043c, centres on u043fu043eu043bu0443u043eu043au0440u0443u0436u043du043eu0441u0442u0435u0439 replaced each other by u043fu043eu043bu0443u0448u0430u0433u0430 cutting u044cu0431u044b, in a section of projections and depressions are formed u0441u043eu043fu0440u00a0u0433u0430u044eu0449u0438u043cu0438u0441u00a0 u043fu043eu043bu0443u044du043bu043bu0438u043fu0441u0430u043cu0438 with radially located large u043fu043eu043bu0443u043eu0441u00a0u043cu0438 equal radius u0443u043fu043eu043cu00a0u043du0443u0442u043eu0439 u043fu043eu043bu0443u043eu043au0440u0443u0436u043du043eu0441u0442u0438,u0442u0430u043du0433u0435u043du0441 angle recovery spiral lines in a u043eu0441u0435u0432u043eu043c u043eu043fu0440u0435u0434u0435u043bu00a0u0435u0442u0441u00a0 attitude u043eu0441u0435u0432u043eu0433u043e step to the circumference, average diameter of the small u043fu043eu043bu0443u043eu0441u0438 ellie the dog is equal to the product of the radius of u0443u043fu043eu043cu00a0u043du0443u0442u043eu0439 u043fu043eu043bu0443u043eu043au0440u0443u0436u043du043eu0441u0442u0438 on cosine angle recovery spiral lines.
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