| 摘要 |
A tubular roller has a circumferential tubular wall provided at its opposite ends with circumferentially offset first cutouts and projections located between adjacent ones of the cutouts. The roller further has two end walls located at the opposite ends and rigidly connected with the tubular wall. The end walls each have circumferentially offset second projections received in the first recesses of the tubular wall, and second recesses which accommodate the first projections of the tubular wall.
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