Therefore, {HEAD ~ generation} of {TAIL ~ scraps} and separation of the protective member can be prevented 
Therefore , { HEAD ~ generation } of { TAIL ~ scraps } and separation of the protective member can be prevented
OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH