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