Clamps 22 are mounted in {TAIL ~ slots} 14 by screws 23 having {HEAD ~ heads} 24 
Clamps 22 are mounted in { TAIL ~ slots } 14 by screws 23 having { HEAD ~ heads } 24
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH