| 摘要 |
Structures built from metal tubing and a method for their construction wherein cast curved sections of tubing are welded to substantially straight sections of metal tubing according to the design requirements of the structures. The cast curved components are stronger and lighter than equivalent components made by bending. In addition, the cast components can be manufactured in a much wider range of configurations, sizes and dimensions (e.g. cast curves can have a greater degree of curve and a much smaller radius of curve than bent components).
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