| 单词 | power meter | 
| 释义 | > as lemmaspower meter   power meter  n. ΚΠ 1865    Sci. Amer. 29 Apr. 280/3  				The combination of a power meter..with an apparatus used to aerate and vaporize liquid hydro carbons. 1903    Sci. Abstr. B. 6 66  				Power Meter... This is an apparatus, patented by A. F. Nagle, for measuring the i.h.p., or rather the indicated work in a given time, at one end of an engine cylinder. 1992    Microelectronics Jrnl. 23 311/2  				Single element pyroelectrical detectors are widely used in spectroscopy, power meters and for intruder alarms. < as lemmas | 
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