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DIN 4109 Beiblatt 2:1989-11

Отменен
Sound insulation in buildings; guidelines for planning and execution; proposals for increased sound insulation; recommendations for sound insulation in personal living and working areas — 16 стр.
ICS
91.120.20 Acoustics in building. Sound insulation / Акустика в зданиях. Звукоизоляция