| 摘要 |
A hollow article (1, 21) made of thermoplastic resin and comprising opposed first (2, 22) and second (3, 23) walls has a strengthening rib (10, 30) extending therebetween integrally formed therewith by blow moulding. The rib comprises a flat portion (7, 26) extending from the first wall (2, 22) to the second wall (3, 23) and a hollow section portion (8, 27) extending along each of the opposed sides of the flat portion between said walls. <IMAGE> |
