Office machines — Vocabulary — Part 4: Letter opening machines
Included bilingual vocabulary serves for facilitating international communication in the field of office machines. Establishes references between entries. Covers vacabulary of letter opening machines.
Office machines — Vocabulary — Part 5: Letter folding machines
Outlines terms used for letter folding machines, their main functions and types, in order to facilitate international exchange. Contains bilingual (English, French) collection of words and definitions and indicates references between them.
Specifies rhe dimensions, tolerances and generally used grades of stainless steel for bends /type 3D (90 and 180 ) with and without straight ends and type 5D (90 )/, concentric and eccentric reducers, tees, caps and stub ends with quality requirements as used for piping work.
The method is suitable as a reference method and is applicable to all fertilizers. It consists in precipitating of nitrate ions in acid solution as a complex with nitron reagent, filtrating of the precipitate, drying and weighing.
Solid mineral fuels — Determination of chlorine — High temperature combustion method
The sample is burnt in a stream of oxygen, in a tube furnace at a temperature of 1250 or 1350 °C, and the acid gases (chlorine and oxides of sulphur) formed are absorbed in hydrogen peroxide. The acid solution is neutralized with sodium tetraborate and the sodium chlorine formed is converted by reaction with mercury(II) oxycyanide to sodium hydroxide which is determined volumetrically.
