An output shaft 5 of motor 4 and {HEAD ~ shaft} 3 are in {TAIL ~ mutual alignment}, i.e. at least substantially coaxial with respect to each other 
are in
An output shaft 5 of motor 4 and { HEAD ~ shaft } 3 are in { TAIL ~ mutual alignment } , i.e. at least substantially coaxial with respect to each other
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH