In addition, there is {HEAD ~ no possibility} of causing {TAIL ~ variations} in projection angle adjustment among maintenance workers 
of causing
In addition , there is { HEAD ~ no possibility } of causing { TAIL ~ variations } in projection angle adjustment among maintenance workers
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH