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For traders who think in codes: chapter → heading → code. Each code links to the shelf it is mapped to, if any. This view never replaces or reorders the human shelves — it only links to them.

← Chapter 84

HS 842139

Machinery; for filtering or purifying gases, other than intake air filters, catalytic converters or particulate filters for internal combustion engines

Mapped category: Separation & Filtration Equipment

Other codes in heading 8421

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