| 摘要 |
A bumper beam includes two tubular bodies formed by tube hydroforming that extend left and right. The tubular bodies are joined to each other in a parallel state. The tubular bodies each have a rectangular vertical cross-section shape including top and bottom and front and rear sides. The tubular bodies are disposed in a line from top to bottom, and opposing surfaces thereof are joined together across the entire length in the longitudinal direction.
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