| 摘要 |
A hollow profiled rod, of, e.g., aluminium, has at least one core portion (22) with an enclosed longitudinal recess (21), and at least one flat external wall (e.g. 26) spaced from the core portion by a hollow chamber (e.g. 23) defined between walls extending from the core portion, each longitudinally-aligned external wall being devoid of longitudinally-aligned breaks. <IMAGE> |
