| 摘要 |
<p>Each web consist of a non-compressible bottom layer which can be fixed with needle strips and an upper layer. The bottom is at least equal to the height of the needles. Pref. the web sections consist of a tuffed fabric of polypropylene or other water-repellent synthetic fibres. Beneath the mat may be a resilient water-permeable base with rectilinear water drainage channels or with parallel ribs held together by threads, both the ribs and the threads being coated with fine-pore plastic foam. The mat can be laid in short sections and fixed to the ground.</p> |
