Harmonized System

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Section VI > Chapter 38 > Heading 3801

Explanatory notes

… silica or iron oxide). The mixture is first extruded or moulded under pressure into “green” blocks of square or … artificial graphite which has a boron content of not more than one part per million, and a total thermal neutrons … (not exceeding 20 parts per million), and is used as a moderator or reflector in nuclear reactors. (b) Impregnated …

Section VI > Chapter 29 > Heading 2918

Explanatory notes

… function” means carboxylic acids which contain also one or more of the oxygen functions referred to in previous … (heading 38.24). (c)  Aluminium citrate , used as a mordant in dyeing. (d) Iron citrate , used in photography. … used in medicine and also for preparing azo-dyes, etc. Its most important salts are : (a) Sodium salicylate . …

Section VI > Chapter 29 > Heading 2941

Explanatory notes

… this heading also includes the following :  Chemically modified antibiotics used as such. These may be prepared by … produced by natural growth of the micro-organism and then modifying the structure by chemical reaction or by adding … medium so that desired groups are incorporated into the molecule by the cell processes (semisynthetic penicillins); …

Section XVI > Chapter 85 > Heading 8536

Explanatory notes

… essentially of devices for making or breaking one or more circuits in which they are connected, or for switching … line is connected to a central point which, by means of a moving arm, can be connected to any one of the other lines. …

Section XVI > Chapter 84 > Heading 8443

Explanatory notes

… or not combined : 8443.31 - - Machines which perform two or more of the functions of printing, copying or facsimile … AND OTHER PRINTING COMPONENTS OF HEADING 84.42 The most common of these machines are rotary presses. In their … a pile. This group also includes printing presses using a movable plate (or platen), and cylinder printing machines. * …

Section XVIII > Chapter 91 > Heading 9105

Explanatory notes

… for indicating the time of day; they must, therefore, have movements other than watch movements . Clocks and alarm … or oscillating armature which actuates the train and the motion work; each impulse from the master clock advances the …

Section VI > Chapter 28 > Heading 2826

Explanatory notes

… the metal salts of hydrofluoric acid of heading 28.11). The most important fluorides are : (1)   Ammonium fluorides : … fermentations, (in lieu of hydrofluoric acid); in dyeing (mordants); for etching glass (mainly acid fluoride); for …

Section XVIII > Chapter 90 > Heading 9019

Explanatory notes

… joints or muscles, by mechanical reproduction of various movements. It should be noted that such treatment is usually … (3)   Apparatus for rotation exercises of the feet. Most of these three types of appliances consist mainly of …

Section XVIII > Chapter 90 > Heading 9026

Explanatory notes

… ‑ Parts and accessories Apart from instruments or apparatus more specifically covered by other headings of the … (e.g., Bourdon tube, diaphragm, bellows, semiconductors) moving a needle or a pointer. In some devices the variations … . These may give a direct reading on a graduated column mounted on the float, or the effect may be transmitted to a …

Section VI > Chapter 28 > Heading 2852

Explanatory notes

… whether or not chemically defined, other than amalgams. The most common compounds of mercury are listed below : (1) … mercury compounds. These may contain one or more mercury atoms, in particular the (–Hg.X) group in which …

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