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In the fifth edition of the textbook the whole presentation of a national economy of modern Russia as an integrate block of social-economic system is given, its universal and specific peculiarities, national interests, realities and vectors of its development are described. Potential of the national economy, its institutions, production and territorial complexes, economic actors, reproduction and stable development, functions of, state and market regulation, finance and real sectors, social institutions of national economy, Russian participation in the world economy are revealed. System of indexes and tools of analysis, strategic economic planning and prognosis at makro-, mezo- and mikrolevel is suggested in the textbook. For students of economic specialities, higher edecacional istitutions, graduate students, researchers.

For efficient use of the product obtained in the preparation of quality mixtures we developed a design of separation device to crushed grains to fractions. An expression for the determination of the maximum speed of the particle passed through the hole of rotating conical surface is got. Analyzing this expression, it was found that the value of the marginal rate of passage of the particles is affected by the angle at the apex of the cone.

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