1721 Manufacture of corrugated paper and paperboard and of containers of paper and paperboard

172111 Corrugated board, in rolls or sheets 172112 Sacks and bags of paper 172113 Cartons, boxes and cases, of corrugated board or corrugated paperboard 172114 Folding cartons, boxes and cases, of non-corrugated paper or paperboard 172115 Box files, letter trays, storage boxes and similar articles of a kind used in offices, shops or the like, of paper