| 单词 | HF (High Frequency) |
| 释义 | HF (High Frequency) HF radio is in the frequency range of 3 MHz–30 MHz and has a wavelength of 100 m–10 m. HF radio has applications in citizens band (CB) radio (also known as shortwave radio), mobile radio, and maritime radio systems. See also electromagnetic spectrum, frequency, Hz, and wavelength. |
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