… the wafers with impurities. (2) Crystal growers and pullers for the production of extremely pure monocrystalline semiconductor boules from which wafers … from the surface of the wafer after it has served its purpose as a “ stencil ”. This equipment may also remove …
… archaeologic, etc., maps, but they are also used for other purposes (e.g., study of tides, ground‑swells, etc.). The … levels, etc. The majority of the instruments used for such purposes are, therefore, covered by the previous paragraphs. …
… into ingots or ingot‑bars for remelting (e.g., for alloying purposes) or into wire‑bars, slabs for rolling, billets … may also be in the form of shot mainly used for alloying purposes and sometimes for grinding into powder. Copper … or which have been machined on one surface for inspection purposes (quality control). Sintered products are obtained …
… or forestry, though some may also be used for other purposes (e.g., in road work, navvying, mining, quarrying, … hay or grass mowers and similar implements, including those pushed or pulled by hand ( Chapter 84 ). (e) Ice axes ( heading …
… forging or other working, at least not for industrial purposes, even though some are malleable. They are used in … qualities, generally in those cases where the use of the pure elements themselves would be impracticable or … been hardened by a special process, as a dense medium (“ pulp ”) in gravimetric separation (selective flotation) of …
… , particularly magnesia (magnesium oxide), whether or not pure, and quicklime and slaked lime (crude calcium oxide and … (distilled and conductivity water and water of similar purity, including water treated with ion‑exchange media). … from impure ammoniacal gas liquors produced in coal gas purification or coke works (see Explanatory Note to heading …
… needles or shiny white flakes, odourless if the acid is pure; an antiseptic and antiputrefaction agent. Its … perfumery. * * * This heading excludes oleic acid of a purity of less than 85 % (calculated on the weight of the dry product) and other fatty acids of a purity of less than 90 % (calculated on the weight of the …
… or 39.19 . This heading also covers synthetic paper pulp consisting of sheets of non-coherent polyethylene or … materials other than plastics ( heading 39.21 ). For this purpose “similarly combined” must be combinations of … regarded as reinforcements or similar combinations for the purposes of this heading. This heading also excludes …
… (see heading 31.02) with charcoal or by the interaction of pulverised coal, sodium and gaseous ammonia. White powder, … 2 ). White or greyish powder according to its degree of purity, soluble in water. Used for destroying insects, … or greyish powder, insoluble in water. Used for the same purposes as cupric cyanide and in medicine. (b) Cupric …
… the core, which can then be used either for attraction or repulsion. (2) Permanent magnets and articles intended to … of a fixed coil around a movable armature, the latter being pulled into the coil when current passes and pulled out … of scrap iron). Certain types are designed for special purposes (e.g., on salvage vessels for the recovery of metal …
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