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Trefoil knot left.svg author User Rybu source this is the mirror image of Image TrefoilKnot TrefoilKnot UTC derivative work Pbroks talk TrefoilKnot en Rybu en Redrawn to SVG format Pbroks TrefoilKnot Rybu original upload log This image is derivative work of the following images Image TrefoilKnot with PDuserw File Upload