| 摘要 |
A metal automobile frame including a number of extruded, constant-section linear bars welded to one another at structural nodes defined by connecting bodies with pockets for housing the linear bars. A pierced linear bar includes a number of tabs, each of which is located inside the pierced linear bar, extends perpendicularly from a side of the pierced linear bar, and is sized so as not to interfere with the opening in the pierced linear bar.
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