| 摘要 |
This is a continuous mode procedure wherein in a first cutting operation an upper band (5) is obtained and a lower band (6), followed by a second cutting operation to obtain some separate trapezoidal segments (4), to finish with a third cutting operation on the curled side (10) of the segment (4) to obtain a circular side with only one radius of curvature, forming in this way a wrapper (11) of conical development.
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