… solution of zinc sulphate is carefully purified to remove cadmium, iron, copper, etc., and is then electrolysed to … under the provisions of Note 5 to Section XV : (1) Zinc‑aluminium alloys, usually with added copper or magnesium used for die‑casting, especially for automobile …
… this process the raw flax is first boiled in a solution of sodium hydroxide and then impregnated with sodium carbonate; it is then treated with dilute acid, when …
… crystal structure as the stones which they resemble, e.g., yttrium aluminium garnet (YAG), cubic zirconia (CZ) and … natural stones by microscopic examination (preferably in a medium other than air) which reveals small bubbles and …
… process of controlled stimulated emission. When the lasing medium (e.g., crystals, gases, liquids, chemical products) … the light beams which are produced inside the lasing medium are repeatedly reflected and amplified in such a way … is partly transparent. In addition to the lasing medium, the energy source (pumping system) and the resonant …
… 8539.31 ‑ ‑ Fluorescent, hot cathode 8539.32 - - Mercury or sodium vapour lamps; metal halide lamps 8539.39 ‑ ‑ Other - … (1) Gas discharge tubes containing gases such as neon, helium, argon, nitrogen or carbon dioxide, including … used for photography or stroboscopic examination. (2) Sodium vapour lamps . (3) Mercury vapour lamps . (4) Gas …
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