Therefore, {TAIL ~ strong impacts} and high torsional moments are never caused in {HEAD ~ a driving shaft} 4, even if tooth traces of gears are inconsistent with each other at the beginning of engagement between rack gears 10 and pinions 12 
Therefore , { TAIL ~ strong impacts } and high torsional moments are never caused in { HEAD ~ a driving shaft } 4 , even if tooth traces of gears are inconsistent with each other at the beginning of engagement between rack gears 10 and pinions 12
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH