| 41. | The avalanching disturbs and removes a bright surface layer of dust to expose a darker substrate.
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| 42. | The running track was renovated in 2003, and received a new surface layer and paint job.
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| 43. | Depth profiling is accomplished by combining an electron spectroscopy with a sputtering source that removes surface layers.
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| 44. | Collins observed that Armstrong " never transmits anything but the surface layer, and that very sparingly ."
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| 45. | Another suggestion is that oil provides a surface layer that prevents plaque or bacteria adhering to teeth.
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| 46. | Touching the surface layer compresses the conductive top sheet so that it makes contact with conductive coating.
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| 47. | Deck cleaners remove dirt and grime and also the surface layer of dead cells in the wood.
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| 48. | The surface has eroded with significant loss of the black and red pigments from the surface layer.
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| 49. | They are initially gregarious and feed only on the surface layer of leaves of their food plant.
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| 50. | Indeed, rain is rapidly absorbed into the surface layer of porous gravel that covers much of Yakutat.
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