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  • Title : The No.30 proposal of the Metrological Administration Conference in 1951
  • The No.30 proposal of the Metrological Administration Conference in 1951,Total 1 pictures
  • Details
    • Dimensions:
      20.80 cm X 28.30 cm X 0.10 cm
    • Classification:
      Metrology
    • Year made:
      1951年