| 摘要 |
The invention relates to a drain element formed of a hydrophilic coherent man-made vitreous fibre substrate (MMVF substrate), wherein the MMVF substrate comprises man-made vitreous fibres bonded with a cured binder composition, the MMVF substrate having opposed first and second ends and a passage which extends from a first opening in the first end to a second opening in the second end. |
