Design Feature:
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(1) Backgrounds divided crosswise, diagonally
(2) Moiré surfaces or backgrounds, marble, degrading surfaces, wooden-like surfaces
(3) Squares
(4) Rhombs or squares standing on one of the corners thereof
(5) More than two quadrilaterals, inside one another
(6) Quadrilaterals with inscriptions projecting beyond one or more of the sides thereof
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