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Grade Granite Triangle Ruler
This grading system aligns with international standards including ISO 8512-2(Surface plates),ANSI/ASME B89.3.7(Granite Surface Plates),and DIN 876(Straightedges and Squares),while extending specifically to triangular geometry applications....
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Precision Granite Triangle Ruler
A Precision Granite Triangle Ruler is not merely a measurement tool—it is a certified angular artifact engineered to establish,verify,and maintain perpendicularity with uncompromising accuracy.Fabricated from ultra-stable,high-density granite and subjecte...
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Black Granite Triangle Ruler
A Granite Triangle Ruler is a master-grade angular reference tool crafted from high-density granite to provide unparalleled stability,accuracy,and durability for establishing,verifying,and transferring precise 90-degree angles in metrology,quality control...



