This International Standard specifies the nomenclature appropriate to the various parts of vertical shredding machines for wood wool production, with hydraulic clamping, in order to assist manufacturers and users in the identification of these parts. NOTE - In addition to terms used in two of the three official IS0 languages (English and French), this International Standard gives the equivalent terms in the German, Spanish and Italian languages; these are published under the responsibility of the member bodies for Ger- many, F.R. (DIN), Spain (AENOR) and Italy (UNI). However, only the terms given in the official languages can be considered as IS0 terms.