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Delta 4 Rond 4

Knauf

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Delta 4 Rond 4

Alpha w0.4
Plenum mm200
Absorption 125hz0.45
Absorption 250hz0.55
Absorption 500hz0.45
Absorption classL
Perforation codeDelta 4 Rond 4
Absorption 1000hz0.4
Absorption 2000hz0.35
Absorption 4000hz0.35
Certification referenceRE CSTB n° AC 98-020/2
Absorption test conditionLM 60

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