| 摘要 |
<p>The adapter comprises a sticky layer (1) and a dust permeable layer (3) with a fine-pored layer (2) located between the two. The dust permeable layer may be a sponge material, whilst the layers may be stuck together by means of vulcanisation (5). The layers may have different thicknesses and rigidity. The adapter may have one or more openings that may be circular, ovular or rectangular. The sticky layer may a layer of velour or fleece (4) and the adapter may be connected with a carrier device to form a unit.</p> |
