{HEAD ~ This invention} concerns a method for the synchronization of {TAIL ~ a gear machining instrument} that works according to the hobbing method 
{ HEAD ~ This invention } concerns a method for the synchronization of { TAIL ~ a gear machining instrument } that works according to the hobbing method
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH