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Design Feature:
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(1) Backgrounds, in words or numerals, divided into two, three or four
(2) Moiré surfaces or backgrounds, marble, degrading surfaces, wooden-like surfaces
(3) More than two circles, inside one another, spirals
(4) Letters or numerals forming a figure in the shape of an arc of a circle
(5) Green
(6) White
(7) Black
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