English to Italian Tech/Engineering Engineering (general)

Come tradurreste "as a practitioner intended"?

"For convenience of tattoo procedures, a conventional tattooing apparatus is configured, so that the tattoo needle automatically travels back and forth and the pigment for tattoo rides the tattoo needle down while it travels back and forth. Here, since the tattoo needle moves while sticking at a given depth on the skin, a tattoo of given shape is represented on the skin as a practitioner
intended."


Grazie !