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