Specifically, {HEAD ~ the end} 31 of the prop 21 is pivotally connected to {TAIL ~ the link} 32 which, in turn, is pivotally connected to the bracket 33 
Specifically , { HEAD ~ the end } 31 of the prop 21 is pivotally connected to { TAIL ~ the link } 32 which , in turn , is pivotally connected to the bracket 33
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH