Redrawn by hand based on this: File:TripleConstraint.jpg. The first revision (88 kb) of this file contains layers and other helpful information for Inkscape editor. The second (latest, 2 kb) revision is optimized for transmitting via network and validated to SVG standard. Rotated by 30° counter-clockwise to avoid accidental misinterpretation with Jewish sign.
Own work
Balu Ertl