JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN
Online ISSN : 1349-838X
Print ISSN : 0019-2341
ISSN-L : 0019-2341
Optimum Periods of Cleaning and Relamping for the Luminaire
Yoshihiko Ohtani
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1993 Volume 77 Issue 7 Pages 404-405,408

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© The Illuminating Engineering Institute of Japan
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