1. Sources
  2. OECD International Trade
  3. International Trade By Commodity Statistics (SITC Rev. 2)
  4. 6: Manufactured goods classified chiefly by material
  5. 66: Non-metallic mineral manufactures, n.e.s.
  6. 664: Glass
  7. 6642: Optical glass and elements of optical glass

6642: Optical glass and elements of optical glass

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