| 摘要 |
PURPOSE:To facilitate pickling of the material by subjecting a board provided with pins each having a sharp tip in a frog (for flower arrangement) mode to the material to slightly cut its skin. CONSTITUTION:Pins 5 each having sharp tips are implanted in a frog mode on e.g. the inner wall of a drum 1, and the drum is rotated through a drive 3 while supporting on a roller 2 to slightly cut the skin of a pickling material in the drum. |
