| 摘要 |
The frame of a crash resistant school bus seat is designed to undergo plastic flow when an impact is applied to the back rest portion of the seat. One or more stopping mechanisms are provided to retard movement of the back rest farther than a predetermined limit, thereby keeping a passenger in an upright position in the seat as a result of a crash. The frame is made from inexpensive, off-the-shelf metal tube and sheet stock and hence is inexpensive to design and build.
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