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indian national weekday 1 - longdayname
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==see also==*laminar flow cabinet*vented balance safety enclosure*eco funnel==references====external links==*northwestern university office for research safety - the chemical fume hood handbook*lab manager magazine: cav, rav & vav*university of louisville's chemical hood user's guide*information from the university of bath in the uk*the fume hood resource center by lab manager magazine*university of toronto's guide to running a sash-shutting campaign
== نظام موازنة الغطاء «sash» ==*northwestern university office for research safety - the chemical fume hood handbook*lab manager magazine: cav, rav & vav*university of louisville's chemical hood user's guide*information from the university of bath in the uk*the fume hood resource center by lab manager magazine*university of toronto's guide to running a sash-shutting campaign