“echelette grating”的概念、定义、翻译、参考文献-科学参考

单词	echelette grating
释义	echelette grating [¦esh·ǝ¦let or ¦āsh¦let ´grād·iŋ] ^SPECTROSCOPY A diffraction grating with coarse groove spacing, designed for the infrared region; has grooves with comparatively flat sides and concentrates most of the radiation by reflection into a small angular coverage.
随便看	Ursa Major Ursa Major cluster Ursa Minor Ursa Minor system Ursidae ursids ursolic acid urstromthal Urticaceae Urticales urticaria Urysohn lemma Urysohn theorem usable usable iron ore usable life usable rate of fire U Sagittae use-dilution test user user-defined function user-defined type user exit user friendly user group

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