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3 Pack Two-Color Scale (inch, cm)Plastic Ruler Set Straight Ruler Plastic Measuring Tool for Student School Office (6 inch Ruler,8 inch Ruler, 12 inch ruler/15,20,30cm) - - Amazon.com
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White Transparent Ruler Isolated Inch Centimetre Inches Centimeters Centimetres Millimeters Stock Photo - Download Image Now - iStock
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Ruler 15 Centimeters and Ruler 6 Inches Stock Vector - Illustration of calibration, equipment: 213158272
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