The certification mark, as intended to be used by authorized persons, is intended to certify that representative samplings of the goods of authorized persons conform to U.S. standard, domestic standards of the other countries of the world and international standard for electrical equipment usually not of a voltage exceeding 600v; fire fighting and fire prevention equipment; chemicals such as detergents, flammable liquids, adhesives, plastics, coatings, fumigants, solvents, flame retardants, refrigerants, and similar chemicals; building materials and equipment; hydraulic equipment, equipment for handling and utilization of hazardous liquids and gases, including heaters, air conditioners, and refrigeration equipment; equipment and systems for protection against burglary, theft, and fire; safety appliances and air ducts; fabrics and decorative materials; prefabricated commercial, industrial, and residential buildings or building units; recreational vehicles; plumbing equipment; automotive equipment and marine equipment.