1. Sources
  2. OECD International Trade
  3. International Trade By Commodity Statistics (SITC Rev. 2)
  4. 7: Machinery and transport equipment
  5. 77: Electrical machinery, apparatus & appliances n.e.s.
  6. 776: Thermionic, cold & photo-cathode valves, tubes, parts
  7. 7768: Piezo-electric crystals, mounted, parts of 776--
  8. 77689: Parts of components of 776--

77689: Parts of components of 776--

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