A slide rule or ruler. Using an old fashioned method to make mathematical calculations. 照片檔
A slide rule with its protective case. A different way in which to make mathematical calculations. A scientific instrument that needs a good case.

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Getty ImagesA Slide Rule Or Ruler Using An Old Fashioned Method To Make Mathematical Calculations, 照片檔
從 Getty Images 下載優越而真實的A slide rule or ruler. Using an old fashioned method to make mathematical calculations.照片檔。在我們廣泛多元的視覺內容目錄中,探索類似的高解像度照片檔。Product #:1456015770
從 Getty Images 下載優越而真實的A slide rule or ruler. Using an old fashioned method to make mathematical calculations.照片檔。在我們廣泛多元的視覺內容目錄中,探索類似的高解像度照片檔。Product #:1456015770HK$2,250HK$400
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