| 11. | The complete interference pattern takes the appearance of a set of concentric rings.
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| 12. | These are concentric rings of lipid and protein, about 1 �m in diameter.
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| 13. | The clock's face is a rippling concentric rings displaying hours, minutes, and seconds.
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| 14. | Each 80 x 65 cm surface contains three concentric rings.
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| 15. | The Acuvue lenses have five concentric rings that alternately correct near or far vision.
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| 16. | In butterflies, the spots are composed of concentric rings of scales of different colours.
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| 17. | The crater displays several concentric rings and radial faults, and an eroded central bulge.
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| 18. | Law enforcement always looks at providing three concentric rings of security for big events,
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| 19. | Concentric ring fractures formed around the volcano, creating convenient conduits for additional volcanic vents.
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| 20. | In 1994, a new roundel was introduced, featuring the national colours in concentric rings.
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