After setting of the resin {HEAD ~ the bolt} is rotated in {TAIL ~ a second sense} so that the bolt penetrates into the anchor to tension the bolt 
is rotated in
After setting of the resin { HEAD ~ the bolt } is rotated in { TAIL ~ a second sense } so that the bolt penetrates into the anchor to tension the bolt
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH