POLYREL
ENCLOSURES, ENTIRELY OR MAINLY MADE OF INSULATING PLASTIC MATERIAL, AS PROTECTIVE ENVELOPES FOR ELECTRICAL, ELECTRONIC, MEASURING, CONTROL AND OTHER EQUIPMENT; JUNCTION AND DISTRIBUTION BOXES ENTIRELY OR MAINLY MADE OF INSULATING PLASTIC MATERIAL, FOR INDOOR OR OUTDOOR INSTALLATION
Expired · November 3, 1976 · 73105309 ·