| 摘要 |
<p>PCT No. PCT/SE80/00137 Sec. 371 Date Dec. 31, 1980 Sec. 102(e) Date Dec. 31, 1980 PCT Filed May 9, 1980 PCT Pub. No. WO80/02580 PCT Pub. Date Nov. 27, 1980.A hygienic absorbent, i.e. a substantially liquid and gas tight sound absorbent, including an under-absorbent (11), a tight foil (13) and gas-filled blisters (15) located therebetween. Preferably a supporting layer (16) is located outside the under-absorbent to support the blisters (15).</p> |
