… ferric oxide, obtained as a by-product from one of the processes of the extraction of aluminium from bauxite. … of its ammonia content, coal gas is chemically purified by passing it through a mass usually composed of bog iron ore or of hydrated …
… in the evaluation of physical, biophysical or biochemical processes and states in animals and humans; their function … of admixtures of two or more reagents or of single reagents dissolved in solvents other than water. They may also be in … as litmus, pH or pole-finding papers or pre-coated immuno-assay plates. Reagents of this heading may also be put up in …
… may also be moulded. For the purposes of this heading, the expression “worked” refers to materials which have undergone processes extending beyond the simple preparations permitted … materials not identifiable as parts of articles remain classified in this heading (e.g., simple discs, plates or …
… and tachometers; stroboscopes 9029.90 ‑ Parts and accessories This heading includes : (A) Counters indicating … of all kinds. Such apparatus and instruments remain classified here whether or not they incorporate a clockwork … a number of articles (printed sheets delivered by a rotary press, articles carried by a conveyor belt, bank notes, …
… types (tunnel ovens) the goods to be heat-treated are passed continuously through the oven (e.g., on a conveyor … rotary plaster ovens. (9) Ovens and furnaces used in the glass or ceramic industries, including tunnel ovens. (10) … specially designed for the melting, sintering or heat processing of fissile materials recovered with a view to …
… different functions (compound valves). The envelopes are of glass, ceramic or metal or of combinations of these … a corresponding electrical signal, usually by a scanning process. (b) Image converter tubes. These are vacuum tubes … (also known as photoemissive cells ). These consist of a glass or quartz tube containing two electrodes, of which the …
… in the crude unworked state or at its various stages of processing prior to its conversion into yarn. It includes : … during the reeling process , in particular : 1) Frisons (floss silk). This is the term applied to the coarse threads …
… chemically or physically treated to increase its density or hardness and improve its mechanical strength or resistance … together, in the latter case the treatment applied being in excess of that required merely to produce a good bond between the layers. Two main processes, impregnation and densification, are used to …
… Automatic door closers This heading covers general purpose classes of base metal accessory fittings and mountings, such as are used largely … The heading does not , however, extend to goods forming an essential part of the structure of the article, such as …
… which have no rings in their structure. They can be classified in two categories : (A) Saturated acyclic … propane (C 3 H 8 ) with three atoms of carbon are, however, classified in heading 27.11 even if they are pure. The … are all insoluble in water. At normal temperature and pressure, such hydrocarbons containing up to four atoms of …
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