| 摘要 |
Chair back rest is joined to the supporting upright thereof by two mating clevises pivotally held together by a pin. The pin is retained in place by an inverted, substantially U-shaped bumper which frictionally engages the top portion of the upright and the forked ends of the outer mating clevis. In a preferred embodiment, the downwardly-depending legs of the bumper are provided with latching means at the terminal portion thereof.
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