acetylene apparatus, namely, torches, regulators or pressure-reducing valves, generators (stationary and portable), and manifolds; acetylene generator compressor or booster system; approved acetylene piping protective devices; automatic fire detection devices and equipment; automatic shut-off devices for liquefied petroleum gas heaters including salamanders; automatic sprinkler systems; automotive and marine service station dispensing units and latch-open devices for dispensing units; check valves for flammable or combustible liquids; appurtenance for storing and handling anhydrous ammonia, namely, pumps, compressors,safety relief devices, liquid-level gaging devices; valves and pressure gages; electrical conductors and equipment; electrostatic fluidized beds and associated equipment, electrostatic fluidized beds and associated equipment; electrostatic hand spray apparatus and devices; employee alarm systems; exit components; fire doors; fixed electrostatic apparatus and devices for coating operations; fixed extinguishing systems components and agents; fixed extinguishing systems, namely, dry chemical, water spray, foam, and gaseous agent extinguishers; flame arresters for flammable or combustible liquids; flexible connectors for flammable liquid and liquefied petroleum gas, namely, piping, valves, and fittings; flexible connectors, namely piping, valves, and fittings; heat-actuated closing devices for dip tanks; hoisting machines and supports for scaffolds; hoses for flammable or combustible liquids; liquiefied petroleum gas container assemblies and storage and handling systems (containers, cylinders); manifolds, separate for each component part or as an assembled unit; mechanical or gravity ventilation systems (automotive service station dispensing area); commercial and industrial liquefied petroleum gas-consuming appliances; portabel fire extinguishers; portable tanks for flammable or combustible liquids; powered industrial truck liquefied petroleum gas conversion equipment; powered industrial trucks for hazardous material; pumps for dispensing liquids; safety cans for flammable or combustible liquids; scaffolding and power or manually operated adjustable suspension scaffold; faucets for dispensing liquids; self-closing fire doors; spray-booth overspray filters; and windows and frames for window frames