GlassecViracon · 2017. 4. 4. · The NBR 10151 version In force, deals with the community noise,...
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GlassecViracon · 2017. 4. 4. · The NBR 10151 version In force, deals with the community noise, dates from 2000. The NBR 10152 dates from 1987 and deals with acoustic comfort In