AIR HYGIENE + AIR PURIFICATION + CLEAN AIR (ENVIRONMENTAL PROTECTION)
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BTATMOSPHERIC ENVIRONMENT (POLLUTION AND PROTECTION)
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BTENVIRONMENTAL HYGIENE (ENVIRONMENTAL PROTECTION)
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BTENVIRONMENTAL PROTECTION + ENVIRONMENTAL CONSERVATION
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UDC504.3.06
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Descriptor GERLUFTHYGIENE + LUFTREINHALTUNG (UMWELTSCHUTZ)
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Descriptor ENGAIR HYGIENE + AIR PURIFICATION + CLEAN AIR (ENVIRONMENTAL PROTECTION)
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Descriptor FREHYGIÈNE DE L'AIR + PURETÉ DE L'AIR (PROTECTION DE L'ENVIRONNEMENT)
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Variant GERREINIGUNG/LUFTREINIGUNG (UMWELTSCHUTZ)
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Variant GERLUFTHYGIENE (UMWELTSCHUTZ)
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Variant GERLUFTREINHALTUNG (UMWELTSCHUTZ)
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Variant GERHYGIENE/LUFTHYGIENE (UMWELTSCHUTZ)
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Variant GERLUFTQUALITÄT/SCHUTZ DER LUFTQUALITÄT (UMWELTSCHUTZ)
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Variant GERLUFT/UMWELTSCHUTZ DER LUFT
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Variant GERSCHUTZ/LUFTQUALITÄTSSCHUTZ (UMWELTSCHUTZ)
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Variant GERLUFTQUALITÄTSSCHUTZ (UMWELTSCHUTZ)
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Variant ENGAIR QUALITY/ENVIRONMENTAL PROTECTION
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Variant ENGENVIRONMENTAL PROTECTION/AIR QUALITY
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Variant ENGAIR PURIFICATION/ENVIRONMENTAL POLLUTION
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Variant ENGENVIRONMENTAL POLLUTION/AIR PURIFICATION
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Variant ENGAIR HYGIENE (ENVIRONMENTAL PROTECTION)
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Variant ENGAIR PURIFICATION (ENVIRONMENTAL PROTECTION)
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Variant ENGCLEAN AIR (ENVIRONMENTAL PROTECTION)
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Variant FREÉPURATION DE L'AIR (PROTECTION DE L'ENVIRONNEMENT)
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Variant FREHYGIÈNE DE L'AIR (PROTECTION DE L'ENVIRONNEMENT)
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Variant FREPURETÉ DE L'AIR (PROTECTION DE L'ENVIRONNEMENT)
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Variant FREAIR/HYGIÈNE DE L'AIR (PROTECTION DE L'ENVIRONNEMENT)
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Variant FREPROTECTION DE L'ENVIRONNEMENT/AIR
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Variant FREAIR/PROTECTION DE L'ENVIRONNEMENT
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Variant FREQUALITÉ DE L'AIR/MESURES DE PROTECTION (PROTECTION DE L'ENVIRONNEMENT)
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NTEXHAUST GASES/AIR PURIFICATION (AIR HYGIENE)
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NTAIR QUALITY CONTROL (ENVIRONMENTAL PROTECTION)
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NTAIR POLLUTION CONTROL (INDUSTRIAL HYGIENE AND ENVIRONMENTAL CONTROL ENGINEERING)
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NTAIR QUALITY DATA, RECORDING AND INVENTORY OF AIR QUALITY (ENVIRONMENTAL PROTECTION)
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NTAIR POLLUTION CONTROL MEASURES (ENVIRONMENTAL PROTECTION)
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RTANALYSIS, CONTROL, MANAGEMENT OF ENVIRONMENTAL POLLUTION
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RTCLIMATE PROTECTION (ENVIRONMENTAL PROTECTION)
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RTAIR COMPOSITION + AIR QUALITY (HEALTH AND HYGIENE)