The comb structure is arranged to be substantially parallel to {TAIL ~ an array} of {HEAD ~ bag breaking bars} 
The comb structure is arranged to be substantially parallel to { TAIL ~ an array } of { HEAD ~ bag breaking bars }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD