| 摘要 |
The method involves making a virtual regime of the movement path of the technological parameter of the borer, as the working point along a harmonic spiral (1). The spiral comprises two symmetrical branches, in a loxodromic fashion, with one turned on a hemisphere and the other on a pseudohemisphere, with the parallel axis spaced by the wavelength of artificial oscillation ( lambda ), and with their bases contacting. When the effective height is reached, the spiral is completed with another symmetrical identical spiral (2).
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