37 Building construction and repair, installation of electrical systems, air conditioning systems, appliances, windows, roofing, pipelines, building insulation; public and rural works, namely, excavation services, installation and repair of irrigation systems, installing septic tanks, road construction; drilling of wells; rental of construction and building equipment, bulldozers and excavators of trees; maintenance and cleaning of buildings, including rooms and floors; application of protective coatings to facades of structures; disinfecting; pest control; laundering of cloth, clothing, fabric, linen, textiles; repair and transformation of clothing; retreading of tires; shoe repair; installation, maintenance and repair of air conditioning apparatus and of electric apparatus, namely, motors, heating apparatus, retinning