| 41. | Bluetooth uses unlicensed radio frequencies in the 2 . 4-gigahertz band.
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| 42. | She took the call on the Park Service's own radio frequency.
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| 43. | Other revenues would be realized from the auction of radio frequencies.
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| 44. | Radio frequency has been used in medicine for about 100 years.
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| 45. | The radio frequency device sits at the end of the catheter.
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| 46. | Q : Can you direct me to a guide for shortwave radio frequencies?
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| 47. | Traveling up the license ladder gives a ham operator access to broader radio frequencies.
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| 48. | This is very wasteful of both radio frequencies and power.
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| 49. | The improved system would compensate for that by sending signals on two radio frequencies.
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| 50. | Bennett invented radio frequency mass spectrometry in ( 1955 ).
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