73119626
Mar 21, 1977
Dec 12, 1978
PIPELINE EQUIPMENT AND ELECTRICAL HEATING AND TEMPERATURE CONTROL COMPONENTS FOR CONVEYING VISCOUS LIQUIDS-NAMELY, PIPE SECTIONS, FITTINGS AND PARTS THEREFOR AND INSULATION, ELECTRICAL HEATING ELEMENTS, HEAT CONTROL PANELS, TRANSFORMERS AND COMPONENTS AND PARTS THEREFOR
Environmental Control Apparatus