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Dosage dispensers. Organization of reparation and maintenance in the field of building construction, industrial construction, plant construction, work on scaffolding, shipbuilding, special engineering, pipeline construction, steel construction and container construction as well as electrical engineering, measurement technique, control and feedback control systems, building services, lagging, insulation for cold, sound insulation, fire protection requirements and protection against electromagnetic radiation, building of storage rooms for cooling, interior fitting of buildings and ships. Construction and assembly work, maintenance and repair work in building construction, industrial construction, plant construction, work on scaffolding, shipbuilding, special engineering, pipeline construction, steel construction and container construction as well as electrical engineering, measurement technique, control and feedback control systems, building services, in the fields of lagging, insulation for cold, sound insulation, fire protection requirements and protection against electromagnetic radiation; installation of buildings, parts of buildings, claddings, roofs and workshops for food processing industry; building of storage rooms for cooling, interior fitting of buildings and ships; renting of construction tools, building material, and scaffolding; supervision and inspection of construction works and projects. Processing, technical advice and technical design of reparation and maintenance in the field of building construction, industrial construction, plant construction, work on scaffolding, shipbuilding, special engineering, pipeline construction, steel construction and container construction as well as electrical engineering, measurement technique, control and feedback control systems, building services, lagging, insulation for cold, sound insulation, fire protection requirements and protection against electromagnetic radiation, building of storage rooms for cooling, interior fitting of buildings and ships.