Harmonized System

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Section VI > Chapter 38 > Heading 3802

Explanatory notes

… of alkaline substances during the calcining process sometimes encourages the formation of surface charges. The … by dry calcination of cellulosic materials impregnated with solutions of certain chemicals (chemical activation). … for adsorbing vapours (for example, in recovering volatile solvents during dry‑cleaning processes, removing benzene …

Section XIII > Chapter 68 > Heading 6804

Explanatory notes

… tools, for the trimming, polishing, sharpening , trueing or sometimes for the cutting of metals, stone, glass, plastics, … powdered clay or kaolin, sometimes with added feldspar), sodium silicate, cement (especially magnesian cement) or …

Section VI > Chapter 28 > Heading 2839

Explanatory notes

… commercial alkali metal silicates.               ‑ Of sodium : 2839.11 ‑ ‑ Sodium metasilicates 2839.19 ‑ ‑ Other … etc.), and their degree of hydration and their solubility vary with the method of manufacture and the …

Section XVI > Chapter 84 > Heading 8424

Explanatory notes

… for projecting, dispersing or spraying steam, liquids or solid materials (e.g., sand, powders, granules, grit or … fine abrasives, at a velocity of 2 to 3 times the speed of sound ( heading 84.56 ). (A) FIRE EXTINGUISHERS, WHETHER OR … machines and the like are often of heavy construction and sometimes incorporate compressors. They are used for …

Section VI > Chapter 28 > Heading 2812

Explanatory notes

… as the monochloride, or from hydriodic acid. Yellow needles soluble in water. Specific gravity about 3. Used for the … to air; decomposed by water. Specific gravity about 1.7. A solvent for sulphur, it is used in the cold vulcanisation of … chloride (sulphur dichloride oxide, sulphinyl chloride) (SOCl 2 ). Obtained by the oxidation of sulphur dichloride …

Section XVI > Chapter 85 > Heading 8514

Explanatory notes

… trough furnaces, crucible furnaces, tunnel furnaces, etc.  Some of these furnaces may have special tilting attachments, … frequency AC in a primary coil is linked magnetically by a soft iron core with the charge to be heated, and induces … is placed between two metal plates connected to a source of AC. In effect the arrangement operates as a …

Section XVI > Chapter 85 > Heading 8512

Explanatory notes

… ‑ Other lighting or visual signalling equipment 8512.30 ‑ Sound signalling equipment 8512.40 ‑ Windscreen wipers, … on one of the tyres or wheel rims of a bicycle or, in some rare cases, of a motor‑cycle. (2)   Battery holders , … signals , transmitting to the driver automatically (sometimes by means of a photoelectric cell) a signal …

Section XVIII > Chapter 90 > Heading 9008

Explanatory notes

… ‑ Projectors, enlargers and reducers 9008.90 ‑ Parts and accessories (A)  Whereas the apparatus of the previous heading is … lenses : one, the condenser, forms an image of the light source on the second lens, called the projection lens. The …

Section XIV > Chapter 71 > Heading 7102

Explanatory notes

… or not worked, but not mounted or set (+). 7102.10 - Unsorted               - Industrial : 7102.21 - - Unworked …

Section XV > Chapter 76

Explanatory notes

… purpose the ground ore is calcined and then treated with sodium hydroxide to produce a solution of sodium aluminate; this is then filtered to … (the latter is sodium aluminium fluoride, but it acts solely as a solvent). This electrolysis is carried out in …

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