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Smoke indicator

Revision as of 18:19, 13 February 2006 by Yslee (talk | contribs)

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매연의 농도를 측정하는 계기를 나타냄.

포즌표와 비교하는 것을 나타냄..

광도를 측정하는것과 양을 측정하는 방법 등이 있음

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