Harmonized System

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Section XVIII > Chapter 90 > Heading 9024

Explanatory notes

… can be used for hardness, tensile, bending, etc., tests by means of separate attachments. Although they usually … an assembly line). Test results may be ascertained either by direct reading (sometimes with the aid of a simple … or even a built‑in microscope or profile projector), or by separate microscopic examination of the test‑piece (e.g., …

Section XVI > Chapter 84 > Heading 8479

Explanatory notes

… which :         (a)  Is not excluded from this Chapter by the operation of any Section or Chapter Note. and  (b) Is not covered more specifically by a heading in any other Chapter of the               …

Section XVI > Chapter 84 > Heading 8412

Explanatory notes

… It has no turbo-compressor, the feed air being forced in by the speed of motion alone and compressed in the … under the effect of a duct. The motive force is provided by the reaction of the exhaust gases expanding through a … more tanks for the storage of propellants, interconnected by a system of tubes and pumps, and a jet-pipe. The pumps …

Section XVIII > Chapter 90 > Heading 9031

Explanatory notes

… not rotate.        Out‑of‑balances are compensated either by counterweights or removal of material.        On machines … device, the vibrations due to unbalance are detected by a special sensitive element and are then amplified. … etc.), for ascertaining the best carburettor setting (by analysing exhaust gases), or for measuring the …

Section VI > Chapter 38 > Heading 3802

Explanatory notes

… when their superficial structure has been modified by appropriate treatment (with heat, chemicals, etc.) in … in two groups : (I)    Products generally characterised by a very large specific surface (of the order of hundreds of square metres per gram), and by the presence of van der Waal’s bonds (physical …

Section XVI > Chapter 84 > Heading 8471

Explanatory notes

… Automatic data processing machines are machines which, by logically interrelated operations performed in accordance … user; (3)   Performing arithmetical computations specified by the user; and (4)   Executing, without human … program which requires them to modify their execution, by logical decision during the processing run. Thus, …

Section XIII > Chapter 69 > Heading 6907

Explanatory notes

… and 6907.40 : 6907.21 - - Of a water absorption coefficient by weight not exceeding 0.5 % 6907.22 - - Of a water absorption coefficient by weight exceeding 0.5 % but not exceeding 10 % 6907.23 - - Of a water absorption coefficient by weight exceeding 10 % 6907.30 - Mosaic cubes and the …

Section VI > Chapter 32 > Heading 3214

Explanatory notes

… differing composition which are essentially characterised by the uses to which they are put. These preparations are … or powder forms which are made pasty at the time of use by heating (e.g., by melting) or by addition of a liquid (e.g., water). The …

Section VI > Chapter 28 > Heading 2844

Explanatory notes

… reactors (I) ISOTOPES The nuclei of an element, defined by its atomic number, always contain the same number of … its constituent parts can be separated for example by diffusion through porous tubes, by electro‑magnetic separation or by fractional …

Section XI > Chapter 56 > Heading 5603

Explanatory notes

… I.  Web formation Four basic methods exist : (a)  by carding or air‑laying fibres in order to form a sheet. … parallel, cross or random oriented (dry‑laid process); (b) by extruding filaments which are directionally oriented, … web in a wet form of the process (spun laid process); (c)  by suspending and dispersing fibres in water, depositing the …

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