73174831
Jun 16, 1978
Jun 3, 1980
INSULATED PIPING SYSTEMS COMPRISING CONDUIT SECTIONS, CARRIER PIPES, INSULATION, COUPLINGS AND FITTINGS SOLD AS A UNIT FOR UNDERGROUND DISTRIBUTION OF LOW TEMPERATURE HOT WATER, DOMESTIC HOT WATER, CHILLED WATER, AND CONDENSATE RETURNS, AND PARTS THEREOF
Environmental Control Apparatus