{HEAD ~ A power} is provided from {TAIL ~ a driven case} 2 even when a driving shaft 4 is inoperative 
is provided from
{ HEAD ~ A power } is provided from { TAIL ~ a driven case } 2 even when a driving shaft 4 is inoperative
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH