37 Installation, constructions, maintenance, and repair of industrial and commercial refrigeration equipment, installations, and control panels for food processing plants, cold dairy processing plants, beverage processing plants, cold storage facilities, petrochemical facilities, blast freezers, and cryogenic cooling equipment; Building constructions consulting services for industrial and commercial refrigeration equipment. Installations, and control panels; Rebuilding services of compressors used in industrial and commercial refrigeration equipment, installations for food processing plants, cold dairy processing plants, beverage processing plants, cold storage facilities, petrochemical facilities, blast freezers, and cryogenic cooling equipment