Gebotszeichen Lüftung
by B.Lachner - uploaded on October 17, 2015, 4:37 am
Safety instructions about proper ventilation.
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- Tags
- Chemie Gebotszeichen Labor Lüftung blau blue chemistry fenster gebot instruction laboratory offen open order saefty sicherheit sign ventilation windows zeichen
- Safe for Work?
- Yes
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