| 摘要 |
Treatment of conveyor or transmission belt (12) of a thermally weldable plastic, comprises roughening the smooth outer surface of the belt by a mechanical abrasive action produced by at least one abrasive band (18, 20) with a specific grain size as the belt passes from one reel to another. An Independent claim is also included for another treatment procedure, comprising abrasive particles projected pneumatically against the surface to be treated.
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