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