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Amazon.com: BronaGrand Triangle Ruler Square Set, 30/60 and 45/90 Degrees, Set of 2 : Everything Else
Amazon.com : Pack of 2 Large Transparent Metric Triangle Ruler Set Square: 30 CM (12 Inch) - 30/60 Degree & 22 CM (9 inch) 45/90 Degree | Essential for School and Work use (CM Scale) : Arts, Crafts & Sewing
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