| 摘要 |
A tension roller assembly adapted to be mounted on a holder having an opening comprising a guide bolt at one axial end abutting against a front face of the holder and having an axial bore, a fastening element separate from the guide bolt having a radially projecting collar for abutting the rear face of the holder and a projection engaging through the opening in the holder and protruding into the bore of the guide bolt and fixed therein.
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