At the same time, the tightening system affixes {TAIL ~ the clamping lock} inside {HEAD ~ the beam} 
At the same time , the tightening system affixes { TAIL ~ the clamping lock } inside { HEAD ~ the beam }
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD