Harmonized System

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Section XVIII > Chapter 90 > Heading 9005

Explanatory notes

… of a system of lenses, some of which may be of large diameter. They are not equipped with an erecting eyepiece … a concave parabolic mirror which may be of a considerable diameter; the reflecting surface is silvered or aluminised. … which are frequently large structures with considerable associated equipment. When equipped with a photographic …

Section I > Chapter 3 > Heading 0304

Explanatory notes

… or frozen.               - Fresh or chilled fillets of tilapias ( Oreochromis spp .), catfish ( Pangasius spp ., Silurus spp ., Clarias spp ., Ictalurus spp .), carp ( Cyprinus spp. , …

Section XVIII > Chapter 92 > Heading 9207

Explanatory notes

… respect, they differ from certain other instruments (e.g., pianos, accordions, guitars) which, while they may be … turns the tone wheels at speeds which vary according to the diameter of the gear wheels. A permanent magnet carrying a … regular intervals around their edges under the pole of the associated magnets; this causes variations in the fields …

Section VI > Chapter 35 > Heading 3507

Explanatory notes

… or a complex organic molecule called a coenzyme (e.g., thiamine diphosphate in pyruvate decarboxylase, pyridoxal … or of culture-broths (the latter derived from bacteria, moulds, etc.).  These products, which may contain … stabilising agents may already exist in the concentrates in variable quantities, deriving either from the fermentation …

Section VI > Chapter 32 > Heading 3204

Explanatory notes

… the distillation of coal tar. This heading applies, inter alia , to : (A)  Unmixed synthetic organic colouring matter … the above-mentioned dyes. Subheading 3204.19 covers inter alia  : -  mixtures described in Note 2 to this Chapter; -   …

Section XVI > Chapter 84 > Heading 8426

Explanatory notes

… heading may be mounted on tractors which are constructed essentially for hauling or pushing another vehicle, appliance or load but, like agricultural tractors, are … for operating the working tools. Such working tools are subsidiary equipment for occasional work. In general, they …

Section XVIII > Chapter 90 > Heading 9017

Section XVI > Chapter 84 > Heading 8418

Explanatory notes

… of the latent heat of evaporation of liquefied gases (e.g., ammonia, halogenated hydrocarbons), of volatile liquids or, … two main types : (A) COMPRESSION TYPE REFRIGERATORS Their essential elements are : (1)   The compressor which receives … by a “generator” in which a strong aqueous solution of ammonia is heated (by gas, oil or electric element), the gas …

Section XVI > Chapter 84 > Heading 8486

Explanatory notes

… Crystal grinders , which grind the crystal boule to precise diameter required for wafers and to grind the flats on the … slice wafers from a boule of monocrystalline semiconductor material . (5)   Wafer grinders, lappers and polishers, … involves bringing the wafer within dimensional tolerances.  Especially critical is the flatness of its surface. (6)   …

Section XVII > Chapter 87 > Heading 8701

Explanatory notes

… tractors means wheeled or track‑laying vehicles constructed essentially for hauling or pushing another vehicle, appliance or load. They may contain subsidiary provision for the transport, in connection with …

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