单词 | optical indicator |
释义 | optical indicator [`äp·tǝ·kǝl `in·dǝ´kād·ǝr] ENGINEERING An instrument which makes a plot of pressure in the cylinder of an engine as a function of piston (or volume) displacement, making use of magnification by optical systems and photographic recording; for example, the small motion of a pressure diaphragm may be transmitted to a mirror to deflect a beam of light. |
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