| 摘要 |
The device for forming an edging or ruff at the edge of a piece of material defines a U-shaped channel of which the end (14) is shown in the figures, and which is defined by an outer wall (17) and an inner wall (18), said inner wall (18) being movable with respect to the outer wall (17) so that the device can be adjusted to suit strips (4) having different widths.
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