| 摘要 |
1,226,808. Interconnected hollow sections. P. A. LATHAM, and P. E. BREFKA. 17 Sept., 1968 [26 Jan., 1968], No. 44098/68. Heading B5A. [Also in Division A6] An extrudate is formed with two hollow portions 21, 22 joined by an interconnecting web 23. The upper hollow portion 21 has a lip 25 which defines a groove 26 while one lower hollow portion has a lip 27 defining a groove 28. (For Figure see next page.) |
