An instrument is provided for working of surfaces of {HEAD ~ parts} inside {TAIL ~ engineered cavities} by means of a tool, with the possibility of simultaneous viewing of the site of the working operation 
An instrument is provided for working of surfaces of { HEAD ~ parts } inside { TAIL ~ engineered cavities } by means of a tool , with the possibility of simultaneous viewing of the site of the working operation
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH