| 摘要 |
A traffic machine for testing carpets to simulate the effect of flat floor wear thereon, said machine having a roller assembly comprising a beam pivotally connected to a lever, the beam being adapted to pivot on an axis substantially parallel to the direction assumed by the path of travel of a table, a plurality of rollers connected to said beam, the rollers being adapted to move substantially perpendicular to the direction of travel of the table.
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