| 摘要 |
The structure comprises a plurality of first components (7) abutting one another and second components (11, 13) for urging the first components towards each other so that the structure or member is adequately stable. Preferably the structure is pre-stressed, and the first components are selected by shape and/or material to withstand compression with the second components selected by shape and/or material to be strong in tension. Small or large structures are available with the invention, for instance bridges. |
