{TAIL ~ The number} of guide bars in each circular concentric series increases from the radially inner series to the radially outer series of {HEAD ~ guide bars} 
{ TAIL ~ The number } of guide bars in each circular concentric series increases from the radially inner series to the radially outer series of { HEAD ~ guide bars }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD