Harmonized System

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Section XVI > Chapter 84 > Heading 8463

Explanatory notes

… machine‑tools are power‑driven but similar machines, worked by hand or pedal, are also covered by this heading. These latter types can be distinguished … from the tools for working in the hand of heading 84.67 , by the fact that they are usually designed to be mounted on …

Section XIII > Chapter 68 > Heading 6814

Explanatory notes

… any of these materials. Thin sheets and splittings obtained by merely rifting and trimming mica books as mined fall in heading 25.25 . The heading covers products obtained by cutting such sheets and splittings. Since they are … mica unsuitable for many uses, it is frequently replaced by agglomerated (built-up) mica (e.g., micanite, …

Section XVIII > Chapter 90 > Heading 9013

Explanatory notes

… visible light and infra‑red regions of the spectrum), by the process of controlled stimulated emission. When the … crystals, gases, liquids, chemical products) is excited by the light from an electric source or by the reaction from another source of energy, the light …

Section XVI > Chapter 85 > Heading 8541

Explanatory notes

… or field is weaker than the resulting action brought about by the change in resistance and thus amplification results . … terminal and two load terminals (emitter and collector). By applying appropriate voltages across the gate and emitter …

Section XV > Chapter 72 > Heading 7204

Explanatory notes

… such iron or steel waste and scrap is usually prepared by means of the following processes, in order to adapt it to the dimensions and qualities required by the users : (a) Shearing or flame-cutting of heavy and … of motor vehicle bodies and other light scrap, followed by separation (which may be magnetic) with a view to …

Section VI > Chapter 28 > Heading 2849

Explanatory notes

… in the pure state, opaque and grey when impure. Decomposed by water to produce acetylene; used for the production of … (2) Silicon carbide (SiC) (carbon silicide). Obtained by treating carbon and silica in an electric furnace. Black … ( heading 68.04 ). (3) Boron carbide (borocarbon). Obtained by treating graphite and boric acid in an electric furnace; …

Section III > Chapter 15 > Heading 1516

Explanatory notes

… fats and oils.      Hydrogenation, which is effected by bringing the products into contact with pure hydrogen at … points of fats and increases the consistency of oils by transforming unsaturated glycerides (e.g., of oleic, … but also makes them less liable to deterioration by atmospheric oxidation, and improves their taste and …

Section VII > Chapter 39 > Heading 3913

Explanatory notes

… acid), is extracted from brown algae ( Phaeophyta ) by maceration in an alkaline solution. It may be produced by precipitating the extract with a mineral acid or by treating the extract to obtain an impure calcium alginate …

Section XVIII > Chapter 90 > Heading 9005

Explanatory notes

… measured to show the amount of light originally received by the telescope, or may be focussed (e.g., by magnetic lenses) to form an image on a photographic plate … to facilitate astronomical observations, particularly by reflecting a given part of the sky into a vertical or …

Section XVIII > Chapter 91 > Heading 9114

Explanatory notes

… all clock or watch parts other than  : (a)   Parts excluded by Chapter Note 1 :         (1)     Weights, clock or watch … and other discrete components formed otherwise than by printing (for example, coils, capacitors, resistors, … glass is sometimes used, or the jewels are replaced by metal caps. Clock or watch jewels bear the names of parts …

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