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JOLIGAEA 2 Pack Metal Scale Ruler, 30cm Aluminum Triangular Scale Rulers for Architects & Engineers : 1:20, 1:25, 1:50, 1:75, 1:100, 1:125 / 1:100, 1:200, 1:250, 1:300, 1:400, 1:500, Blue : Amazon.co.uk: Stationery & Office Supplies
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Artway Scale Ruler - Metric - 300mm with 8 Different Scales from 1:1 to 1:2500 : Amazon.co.uk: Stationery & Office Supplies
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150mm Verulam Engineers Flat Oval Scale Ruler. No.46 Scales: Side 1 – 1:2.5, 1:25 & 1:33 1/3 Side 2 – 1:75, 1:150 & 1:125, 1:250. : Amazon.co.uk: Stationery & Office Supplies
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