1592952542000 1312632483000 term-2568 1616540939154 1312632487000 1615829353745 adlib fitz-online adlib-term-2568 fc09e86e-6ebe-301d-a732-bddc5ff22ab5 3 B.BM.BUE.BOK.BOK.AFU.BOK 1 code B.BM.BUE.BOK.BOK.AFU.BOK 1 sound absorption reference term-2569 adlib-term-2569 7b1d8ea4-8d36-3c7a-9a76-9c21745e34ae <acoustics concepts> sound absorption term