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OECD International Trade
International Trade By Commodity Statistics (SITC Rev. 3)
8: Miscellaneous manufactured articles
88: Photo apparatus, optical goods, watches and clocks
884: Optical goods, n.e.s.
8842: Spectacle & spectacle frames
8842: Spectacle & spectacle frames
88421: Frames & mountings for spectacles, goggles & simil.
88422: Parts for frames & mountings of spectacle & simil.
88423: Spectacles, goggles & the like, corrective, protectiv
8842: Spectacle & spectacle frames
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