| 单词 | ceilometer |
| 释义 | ceilometer /see lom"i teuhr, si-/, n. an automatic device for measuring and recording the height of clouds by projecting a modulated beam of light onto a cloud base, receiving the reflection of light through a photoelectric apparatus, and computing the height by triangulation. [1940-45; CEIL(ING) + -O- + -METER] |
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