| 摘要 |
PROBLEM TO BE SOLVED: To provide a bumper improved in energy absorbing efficiency, while restricting increase of the weight of the bumper. SOLUTION: The bumper has an impact applying surface 1a, to which an impact is to be applied, and the impact applying surface 1a is held by vertical walls 1b vertically against the vertical wall 1b, and the impact applying surface 1a is formed with a groove 1c along the impact applying surface 1a. COPYRIGHT: (C)2007,JPO&INPIT
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