73551316
Aug 1, 1985
Apr 1, 1986
PARTITION PANELS, WALL LINING PANELS, CEILING PANELS, ROOF DECKING, BUILDING BLOCKS, SEWERAGE AND WATER PIPES, CEMENTITIOUS AND GYPSUM FLOORING BLOCKS, ELECTRICAL CABLE DUCTS, FIREPROOF CASINGS FOR STEEL STRUCTURES; ALL MADE OF CEMENT, CEMENTITIOUS MATERIALS, GYPSUM OR OF CONCRETE
Nonmetallic Building Materials