… This heading includes : (A) Electron microscopes differ from optical microscopes in that they use a beam of … an assembly of the following devices usually enclosed in a common frame as a unit : (1) A device (known as an electron … which maintains a vacuum in the electron tube; these are sometimes self‑contained units connected to the appliance. …
… organic surface-active agents of this heading are chemical compounds, not chemically defined, which contain one or more … as surface-active agents and are therefore excluded from this heading. Organic surface-active agents may be : … This ionic behaviour is similar to that of amphoteric compounds in the broadest sense. These are, for example, …
… SO 2 NR 2 R 3 ) where R 1 is an organic radical of varying complexity having a carbon atom directly attached to the SO 2 group and R 2 and R 3 … another atom or an inorganic or organic radical of varying complexity (including double bonds or rings). Many are used …
… consists of oxides, carbides, borides, etc. The metal component consists of a metal such as iron, nickel, aluminium, chromium or cobalt. Cermets are made by sintering, by … by other processes. The most important cermets are obtained from : (1) A metal and an oxide, e.g., iron‑magnesium …
… heading are designed for projecting still images. The most common type is the projection lantern (or diascope) which is … on the screen. A high power light source is used, the light from which is concentrated by a reflector. Slides may be changed manually, semi‑automatically (by means of an electromagnet or by a motor …
… ACIDS Both rosin and resin acids consist essentially of complex mixtures of abietic acid and allied acids with small amounts of non‑acidic components. They are solids, usually transparent and vitreous. Their colour may vary from pale yellow to dark brown according to the amount of …
… harvesting machinery; threshing machinery : 8433.51 ‑ ‑ Combine harvester‑threshers 8433.52 ‑ ‑ Other threshing … a wheeled row of semi‑circular teeth, which can be lifted automatically. (6) Tedder rakes , windrower rakes , … picking up and baling hay or straw left on the field. (8) Combine harvesters , which successively reap, thresh, clean …
… inter alia : (1) De‑hairing machines , which remove from the raw skins the hairs previously loosened by chemical … and to restore the grain. (6) Hammer machines used for compacting , hardening or smoothing leather (e.g., for shoe … to an even length, for removing long hairs, for curling, combing, brushing or dyeing the fur). The heading also …
… by disintegrating or grinding wood, freed of its bark and sometimes of its knots, into its fibres by mechanical … colour (brown mechanical wood pulp). Further development from the traditional grinding methods is the pulp referred …
… The heading covers a number of earth digging, excavating or compacting machines which are explicitly cited in the heading and which have in common the fact that they are all self‑propelled. The … grade solid or pneumatic tyres. (F) Mechanical shovels (boom, jib or cable type) which dig into the soil, above or …
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