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OECD International Trade
International Trade By Commodity Statistics (SITC Rev. 2)
8: Miscellaneous manufactured articles
87: Professional, scientific & controling instruments
871: Optical instruments and apparatus
8710: Optical instruments and apparatus
87101: Refracting telescopes, prismatic or not
87101: Refracting telescopes, prismatic or not
87101: Refracting telescopes, prismatic or not
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