| 摘要 |
1,147,950. Corrugated sheets. TECHNIGAZ. 20 July, 1966 [31 July, 1965], No. 32616/66. Heading E1K. Spaced intersecting corrugations 2 formed on one side of a sheet form areas 4 of polygonal shape and have hollow depressions 5 transverse to the corrugations in the vicinity of the points of intersection 3. The sheet may be of metal and the polygons have three, four and six sides. |
