{HEAD ~ A slide} that is vertically slidable on {TAIL ~ the bracket}, holds a bolt that has a cam engaged with the cam follower of the bracket, so when the bolt is turned the slide moves up or down 
is vertically slidable on
{ HEAD ~ A slide } that is vertically slidable on { TAIL ~ the bracket } , holds a bolt that has a cam engaged with the cam follower of the bracket , so when the bolt is turned the slide moves up or down
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH