“sonic altimeter”的概念、定义、翻译、参考文献-科学参考

单词	sonic altimeter
释义	sonic altimeter [`sän·ik al`tim·ǝd·ǝr] ^ENGINEERING An instrument for determining the height of an aircraft above the earth by measuring the time taken for sound waves to travel from the aircraft to the surface of the earth and back to the aircraft again.
随便看	periodic periodic acid periodic antenna periodic continued fraction periodic current periodic damping periodic disease periodic duty periodic field focusing periodic function periodicity periodic kiln periodic lattice periodic law periodic line periodic motion periodic peritonitis periodic perturbation periodic quantity periodic spring periodic table periodic wave period-luminosity relation period of vibration periodogram

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