Harmonized System

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Section XIV > Chapter 71 > Heading 7103

Explanatory notes

… often also because of their rarity, these stones, which are usually crystalline, are used by jewellers, goldsmiths and … purposes (e.g., ruby, sapphire, agate, piezo-electric quartz). The provisions of the second paragraph of the … of course, restricted to those stones and varieties of a quality suitable for use in jewellery, etc. This heading …

Section XVIII > Chapter 91 > Heading 9105

Explanatory notes

… and hairspring, a tuning fork or a piezo‑electric quartz crystal. They are often equipped with a striking mechanism (hours, half‑hours, or quarters) acting on a bell or gong, or a multi‑gong chiming … which it drives by remote control. The master clock has usually a mechanical or electrical movement and a contact …

Section XVI > Chapter 84 > Heading 8419

Explanatory notes

… separation, and isotopic exchange apparatus employing the “dual‑temperature” method ( heading 84.01 ). (e)   Steam …

Section XI > Chapter 58 > Heading 5810

Explanatory notes

… effect on that ground. The embroidery threads are usually of textiles, but the heading also includes those … (for example, metal, glass or raffia). The ground fabric usually forms part of the completed embroidery, but in … other a shuttle thread underneath the fabric, the latter usually finer than the former. Thus the right and wrong …

Section XVIII > Chapter 90 > Heading 9019

Explanatory notes

… movements. It should be noted that such treatment is usually carried out under medical supervision; the apparatus … body (abdomen, feet, legs, back, arms, hands, face, etc.) usually operate by friction, vibration, etc. They may be … type in particular may include interchangeable attachments (usually of rubber) to allow various methods of application …

Section XVI > Chapter 84 > Heading 8443

Explanatory notes

… are rotary presses. In their simplest form, these presses usually consist of a cylinder with two semi-cylindrical … scarves or handkerchiefs). (2)  Roller printing machines , usually consisting of a large central cylinder (pressure … points on a positively charged photoconductive surface (usually a drum) leaving a positively charged replica of the …

Section XIII > Chapter 70 > Heading 7010

Explanatory notes

… are formed by the action of compressed air. They are usually made of ordinary glass (colourless or coloured) … lead crystal, and certain large carboys are made of fused quartz or other fused silica.        The above-mentioned … They may be fitted with drop measuring devices or may be graduated, provided that they are not of a kind used as …

Section XIII > Chapter 69 > Heading 6901

Explanatory notes

… products (e.g., rice boll ash). These materials are usually mixed with binders (such as clay or magnesia) and … hair, sawdust, coal dust).        These articles are usually very light weight, and their porous structure makes … and semi-silica refractories (based upon sand, crushed quartz, flint, etc., and bonded with clay or lime). (4)   …

Section VI > Chapter 32 > Heading 3210

Explanatory notes

… no solvent , which may consist of : (a)  liquid plastics (usually epoxide resins or polyurethanes) and a … mineral substances (e.g., whiting) with certain quantities, usually very small, of binders such as skin glue or casein. … white, casein distempers and silicate distempers. They are usually in powder form, but may be presented as pastes or …

Section XVI > Chapter 85 > Heading 8540

Explanatory notes

… of an optical image into a corresponding electrical signal, usually by a scanning process. (b) Image converter tubes. These are vacuum tubes in which an image (usually of infra‑red radiation) is projected on to a … fall in the form of a beam on a part of the inner wall (usually the end of the tube) covered with fluorescent …