| 单词 |
helium spectrometer |
| 释义 |
helium spectrometer helium spectrometer[′hē·lē·əm spek′träm·əd·ər] (spectroscopy) A small mass spectrometer used to detect the presence of helium in a vacuum system; for leak detection, a jet of helium is applied to suspected leaks in the outer surface of the system. |
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