GB 7793-1987

Hygienic standard of lighting and illumination in elementary and middle school

NORMA vydaná dňa 12.5.1987

Anglicky a čínsky -
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The information about the standard:

Designation standards: GB 7793-1987
Note: NEPLATNÁ
Publication date standards: 12.5.1987
Country: Chinese technical standard
Kategória: Technické normy GB