| 21. | The park refers to its precipitation water temporarily dams up above the flat retention hopper and builds reflecting surfaces.
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| 22. | The organ pipes at the back of the stage provide both a gleaming visual focus and another sound-reflecting surface.
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| 23. | For a high gain antenna, the feedhorn assembly is located facing the reflecting surface at or near the focal point.
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| 24. | The actuators apply variable forces to the mirror body to keep the reflecting surface in the correct shape over repositioning.
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| 25. | While silver is less expensive and more widely used, it is more prone to oxidation resulting in a non-reflecting surface.
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| 26. | Since there were no reflecting surfaces near the source, the data also indicated that a weaker radial dipole component also existed.
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| 27. | The incoherent light, the standing waves are distinct only within a microscopically thin volume of space next to the reflecting surface.
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| 28. | In reflection mode, the phase shift image provides a relative distance measurement and thus represents a topography map of the reflecting surface.
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| 29. | These were said to " afford a good reflecting surface for light and are also to be commended for sanitary reasons ."
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| 30. | The change of diffusers are often used to create more reflecting surfaces and further encourage even distribution of any particular sound field.
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