| 21. | Below the rotor, two concentric rings were mounted, connected to each other with bearings.
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| 22. | Concentric rings are marked at 30in, 4 feet, 7 feet, and from the centre.
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| 23. | The thrower stands at the centre of concentric rings marked on an open field.
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| 24. | In butterflies, the spots are composed of concentric rings of scales in different colors.
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| 25. | This genus is characterized especially by the concentric rings of muscle fibers in the proboscis.
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| 26. | Eight concentric rings are inscribed on the compass rose.
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| 27. | The Mexican government has designated concentric rings around the ruins as having certain archeological values.
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| 28. | Other stucco designs that can be seen in Gubyaukgyi include concentric rings and ogre figurines.
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| 29. | The spicules form blade-like structures, ornamented with concentric rings.
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| 30. | The model generated four concentric rings of agricultural activity.
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