TY JOUR TI INCREASE IN LEVEL OF ENERGY EFFICIENCY OF CONSTRUCTION PRODUCTION ON THE BASIS OF APPLICATION OF MODERN MEANS OF MECHANIZATION KW machine parks KW energy efficiency KW productivity KW the given expenses KW prime cost JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Prohorov, S.V. PY 2017 IS 2 PB Belgorod State Technological University named after V.G. Shukhov