Curtain walling of non-metallic materials; Curtain walls of non-metallic materials; Flexible partitions of non-metallic materials; Internal non-metallic partitions for buildings; Mobile partitions (doors) made of non-metallic materials; Mobile partitions (non-metallic structures); Movable partitions (walls) of non-metallic materials; Movable partitions of plastic (other than furniture); Non-metallic building partitions; Non-metallic interior partitions for buildings; Non-metallic wall partitions, other than furniture; Partitions (structures) made principally of synthetic materials; Partitions of plastic (other than furniture); Partitions, not of metal; Removable partitions, not of metal