First, {HEAD ~ a pad} used in semiconductor device fabrication is rotated in {TAIL ~ a first direction}  
is rotated in
First , { HEAD ~ a pad } used in semiconductor device fabrication is rotated in { TAIL ~ a first direction }
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH