A computer controlled wireless focus mechanism is used to regulate {TAIL ~ the vertical distance} between {HEAD ~ the focused laser assembly} and the work surface 
A computer controlled wireless focus mechanism is used to regulate { TAIL ~ the vertical distance } between { HEAD ~ the focused laser assembly } and the work surface
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH