Electric Door Opener

Electric Door Opener dwg file..EARTHING SHALL BE PROVIDED AT EACH DUCT SPOOL CONNECTION. ONLY TWO EARTHING REQUIRED AT EVERY DUCT JOINT. INSULATION PHYSICALLY (IRRADIATION) CLOSED CELL POLYOLEFIN FOAM WITH FACTORY APPLIED. HEAVY DUTY MULTILAYER COMPOSSITE WITH A SPECIALLY DEVELOPED UV AND WEATHER DURABLE COATING