Tensioning springs 26 are provided between screw heads 24 and {HEAD ~ washers} 25 contacting {TAIL ~ member} 12 
contacting
Tensioning springs 26 are provided between screw heads 24 and { HEAD ~ washers } 25 contacting { TAIL ~ member } 12
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL OTH