Harmonized System

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Section XVIII > Chapter 90 > Heading 9002

Explanatory notes

… when in a permanent mounting (viz., fitted in a support or frame, etc.) suitable for fitting to an apparatus or … polarising) for astronomical instruments, binoculars or refracting telescopes, microscopes, etc. (4)   Mounted … put up in cases and designed for fitting into special frames for sight testing (used by opticians) ( heading 90.18 …

Section VI > Chapter 36 > Heading 3601

Explanatory notes

… charcoal.         This powder, the colour of which varies from black to brown, is slightly hygroscopic and is used as … as diphenylamine. These powders may be manufactured either from nitrocellulose and solvents, or from nitrocellulose to which barium nitrate or potassium …

Section VI > Chapter 36 > Heading 3602

Explanatory notes

… to these products to reduce their sensitivity to shock or friction. The heading includes : (1)         Explosives … which are much more sensitive in the dry state to shock and friction than the explosives of the types mentioned in the … are generally used in the preparation of percussion, friction or flame primers for propellent charges or of …

Section VI > Chapter 29 > Heading 2924

Explanatory notes

… of azo dyes, are also included here. Ureines are derived from urea by replacing one or more hydrogen atoms of the –NH … groups by alicyclic or aryl radicals. Ureides are obtained from urea by replacing one or more of the hydrogen atoms of … (2) Asparagine , the mono-amide of aspartic acid. Extracted from certain vegetables. Crystalline. (3) Open chain ureides …

Section XVIII > Chapter 90 > Heading 9020

Explanatory notes

… may be self‑contained (where the breathing circuit is fed from a cylinder of oxygen or compressed air) or may be … In these appliances air for breathing comes directly from the outside and is passed through a filtering device … with an arrangement enabling the wearer to see, a metal frame with outlet and inlet valves, and a socket to which is …

Section VI > Chapter 38 > Heading 3810

Explanatory notes

… preparations used to remove oxides, scale, rust or tarnish from the surface of metals, or for roughening these surfaces … the metal surfaces to be joined and the solder itself from oxidation.  They have the property of dissolving the …

Section XIII > Chapter 70 > Heading 7014

Explanatory notes

… (by automobile headlamps, for example) and are thus visible from a distance in the dark. (B)  Optical elements of glass … obtained by simple moulding or pressing or by cutting from sheets, strips, lumps or slabs. The articles remain here even if framed, set in a mounting or backed with a reflecting …

Section XIII > Chapter 69 > Heading 6913

Explanatory notes

… nature or finish for decorative use, e.g. : (a)   Cornices, friezes and similar architectural ornaments ( heading 69.05 … plates); medallions; firescreens; artificial flowers, fruit, leaves, etc.; wreaths and similar ornaments for … paperweights and similar desk furnishings and picture frames. …

Section XV > Chapter 73 > Heading 7305

Explanatory notes

… or riveting preformed, unclosed, tubular shapes produced from flat‑rolled products. The tubular shapes can be … 7305.11 This subheading covers tubes manufactured from steel plate by forming in a press or by rolling, and by … 7305.12 This subheading covers mainly tubes manufactured from coils of steel by continuous forming through a train of …

Section VI > Chapter 28 > Heading 2821

Explanatory notes

… (A) IRON OXIDES Ferric oxide (Fe 2 O 3 ). Obtained from dehydrated ferrous sulphate or natural iron oxide. … here ‑ or mixed with carbon, Prussian brown, etc. (saffron or Mars yellow), when it falls in heading 32.06 . … (c)   Iron scalings, crude oxides which become detached from the surface of iron brought to red heat or hammered ( …