Aluminum Alloy Triangular Scale Ruler with Three Different Side - China Measuring Tools, Triangle Ruler
12inch Triangular Architect's ruler features 3 sides with 6 different scales. Percise scales,1:100, 1:200, 1:250, 1:300, 1:400, 1:500. For
ECYC 12 Triangular Scale Ruler 1:100/200/250/300/400/500 Plastic Engineering Mechanical Drafting Ruler
triangular scales
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