| 摘要 |
1497739 Laminates C VAN OPSTAL INTERNATIONAL BV 27 June 1975 [29 May 1975] 27363/75 Heading B5N [Also in Division E1] A panel for use in roof boarding comprises a layer 1 of fibre-board covered by a layer 2 of synthetic foam, e.g. polyurethane foam, preferably applied by spraying, to which are applied battens 3, a freely foamed up synthetic foam coat 4 being applied between the battens. This coat 4 acts as a thermal insulating layer and helps to support the batten. |
