… conformity with a machining programme. Consequently, this group covers machine‑tools which carry out two or more … cylinder : these two types of head may be combined. This group covers unit construction machines (single station) … . (C) MULTI‑STATION TRANSFER MACHINES The machines of this group must satisfy three conditions : they must carry out …
… by replacing one or more atoms of hydrogen by the hydroxyl group. They are oxygenated compounds which react with acids … The alcohols may be primary (containing the characteristic group –CH 2 OH), secondary (containing the characteristic group > CHOH) or tertiary (containing the characteristic …
… obtained, in the second, polynuclear phenols. The hydroxyl group may also be present as a substitute in benzene … to light. (11) Dihydroxynaphthalenes (C 10 H 6 (OH) 2 ). A group of ten compounds obtained by replacing two hydrogen … in the ring of the naphthalene molecule by two hydroxyl groups. Some are used in the manufacture of dyes. (D) …
… or phenols in which the hydrogen atom of the hydroxyl group is replaced by a hydrocarbon radical (alkyl or aryl). … by replacing the hydrogen of the phenolic hydroxyl group (in the case of phenol-alcohols), or of one of the alcoholic hydroxyl groups (in the case of polyhydric alcohols), by an alkyl or …
… as “wallpaper”. “Lincrusta” also belongs to this group. It consists of heavy paper material coated with a … or ceiling decoration. (c) Wall coverings of paper made up of several panels which are printed so as to make up a …
… the hydrogen atoms (other than a hydrogen in the aldehyde group (-CHO) by one or more halogens, sulpho groups (-SO 3 H), nitro groups (-NO 2 ) or nitroso groups …
… or not optical . It should, however, be noted that this group does not include any instruments, apparatus, etc., … jets. In electrical types a sapphire or diamond pick‑up moves across the surface to be tested and converts any …
… and other keyboard stringed instruments (+) . 9201.10 ‑ Upright pianos 9201.20 ‑ Grand pianos 9201.90 ‑ Other This … mounted horizontally in an elongated casing. This group includes automatic pianos , whether or not …
… the sparking plugs in turn, and also incorporate an interrupter to make and break the circuit in the primary winding … container. By connecting the primary via an interrupter to the battery, a high voltage is produced in the … They are fitted with a small pinion capable of travelling up and down a screwed shaft, or with some other mechanical …
