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  1. Rulex® 30cm metric metal (c) triangular architects scale ruler

  2. Rulex® 30cm 12"" Imperial triangular scale ruler with 12 different scales

  3. Rulex® 150mm 6"" engineering scale ruler with 8 different scales

  4. Rulex® 300mm conversion oval scale rule; imperial drawing to metric measurements

  5. Rulex 100mm 10cm Micro Silver Metal Triangular Scale Ruler with Coloured Stripes

  6. Rulex® 300mm conversion oval scale rule; metric drawing to imperial measurements

  7. Rulex OS map scale card scales: 1:25000, 1:50000 and 1:40000 and Naismith's Rule

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