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