{TAIL ~ The drive mechanism} of the apparatus moves {HEAD ~ the drive shaft} 22 to begin moving the cam member 24 toward the tube 20 
{ TAIL ~ The drive mechanism } of the apparatus moves { HEAD ~ the drive shaft } 22 to begin moving the cam member 24 toward the tube 20
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH