90711959
May 14, 2021
Precast concrete products, namely, electrical junction boxes of concrete
Electrical and Scientific ApparatusNon-metal construction materials, namely, precast concrete panels, slabs, beams, walls, stairs; precast concrete products in the nature of highway traffic barriers, box culverts being construction materials, retaining walls, manholes, drainage structures in the nature of trench drains and storm manholes, parking curbs, cattle guards, prestressed concrete products in the nature of bridge beams, deck panels, pilings; structural members formed of prestressed concrete
Nonmetallic Building Materials