9 Liquified Gas Storage and Dispensing Apparatus and Parts Therefor-Namely, Manifolds, Manifold Housings, Gages, Headers, Block Assemblies, Pressure Regulators, Valves, Alarms and Alarm Panels, Flash Arrestors, Electrically Powered Gas Heaters, Pipes, Tubing and Hose, and Connectors and Plugs Therefor, All Sold as a Unit