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