Design Feature:
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(1) Mathematical signs combined with figures or letters
(2) Rectangles
(3)
(4) Quadrilaterals containing one or more letters
(5) Quadrilaterals containing other inscriptions
(6) Quadrilaterals containing one or more lines or bands (specify the content)
(7) Thin lines
(8) Horizontal lines or bands
(9) Three lines
(10) Letter “A”
(11) Letter “V”
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