Outer circumference faces 11a and 12a of respective bearing cases 11 and 12 may be utilized as {HEAD ~ rotational supports} for {TAIL ~ face plates} 13 and 14, respectively 
for
Outer circumference faces 11a and 12a of respective bearing cases 11 and 12 may be utilized as { HEAD ~ rotational supports } for { TAIL ~ face plates } 13 and 14 , respectively
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH