37 Repair and installation of mechanical devices, namely, dispensers of preset portions of powder for dosing purposes; Repair and installation of electric grinding machines for metalworking; Repair and installation of transporting and conveying machines, namely, belt conveyors; Repair and installation of tractor towed agricultural implements, for cutting grass, namely, mowers; Repair and installation of agricultural seed planting machines, namely, sowers; Repair and installation of agricultural machines for ground cultivation, namely, power-operated cultivator; Repair and installation of agricultural machines, namely, cultivators, precision cultivators, precision 3-point cultivators, harrows, tined harrow, spring tooth harrows, hoes, cultivators, harvestors, disk harrows, seeders, weeders, precision weeders; Repair and installation of cutting machines for metalworking; Repair and installation of machines for machining metals, namely, metal working machines; Repair and installation of food peeling machines for commercial use; Repair and installation of food chopping machines for commercial use; Repair and installation of rolling mills for metalworking and crushing machines for industrial purposes; Repair and installation of mechanical presses for metalworking; Repair and installation of machines for the transport of powdery goods, namely, belt conveyors; Repair and installation of electric machines for processing of food, namely, food processors; Repair and installation of loading machines for agricultural machines; Repair and installation of machines for plastics working; Repair and installation of machines for processing plastics; Building construction; Application of wear-resistant coatings on metals and plastics for others, namely, applying protective coatings