37 Installation services of working and building platforms; Servicing and repair of aerial work platforms; Cleaning of packaging materials, packaging containers and transport pallets; Installation, maintenance and repair of the following goods: Machinery for filling containers; Maintenance and repair of transport containers; Carpentry services; Sanding; Painting, interior and exterior; Coating services; Installation, maintenance and repair of measuring machines; Maintenance and repair of laser measuring apparatus; Maintenance of welding machines and equipment; rental of building scaffolds and rental of working platforms and Rental of building platforms; Water and oil well drilling; Rental of concrete-mixing apparatus