| 摘要 |
The apparatus comprises at least a first and second web holding means (1a, 1b), the first web holding means (1a) being attached to a shaft (2a), the shaft (2a) being displaced from an axis of rotation (15); the apparatus further comprising a means (4) for moving the shaft (2a) so that the distance between the first and second web holding means (1a, 1b) is alternatively increased and decreased as the apparatus rotates about the axis of rotation (15).
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