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  2. General Rules for the Interpretation of the Harmonized System

    en.wikipedia.org/wiki/General_Rules_for_the...

    There are 6 General Rules in all, which must be applied in consecutive order. GRI 1 prescribes how to classify products at the 4-digit Heading level, based on the wording of the headings and the relative HS Section and Chapter Notes.

  3. Harmonized Tariff Schedule of the United States - Wikipedia

    en.wikipedia.org/wiki/Harmonized_Tariff_Schedule...

    It can also be used in place of Schedule B for classifying goods exported from the United States to foreign countries. [1] The Harmonized Tariff Schedule classifies a good based on its name, use, and/or the material used in its construction and assigns it a ten-digit classification code number, and there are over 17,000 unique classification ...

  4. Fume hood - Wikipedia

    en.wikipedia.org/wiki/Fume_hood

    Ductless fume hoods, also known as recirculating [16]: 502 or self-contained hoods, [8]: 160 are units that do not extract air out of the building or work environment. Rather, air is sucked through the front opening of the hood and through a filter, before passing through the fan mounted on the top (soffit) of the hood or beneath the worktop ...

  5. Harmonized System - Wikipedia

    en.wikipedia.org/wiki/Harmonized_System

    The process of assigning HS codes is known as "HS Classification". All products can be classified in the HS by using the General Rules for the Interpretation of the Harmonized System ("GRI") that must be applied in strict order. HS codes can be determined by a variety of factors including a product's composition, its form and its function.

  6. Kitchen hood - Wikipedia

    en.wikipedia.org/wiki/Kitchen_hood

    A kitchen hood, exhaust hood, hood fan, extractor hood, or range hood is a device containing a mechanical fan that hangs above the stove or cooktop in the kitchen. It removes airborne grease, combustion products, fumes, smoke, heat, and steam from the air by evacuation of the air and filtration. [ 1 ]

  7. Vented balance safety enclosure - Wikipedia

    en.wikipedia.org/wiki/Vented_Balance_Safety...

    Vented balance safety enclosures are used in pharmaceutical, chemical, biological, and toxicological laboratories to provide maximum containment for weighing operations in weighing scales. Fume hoods, also known as laboratory chemical hoods, are one of the most important and widely used engineering controls to protect laboratory workers. Fume ...

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