Alternatively, the side walls 47, 38 and {HEAD ~ back wall} 39 of the first pivot mount 40 can be formed with {TAIL ~ one or more pieces} of metal and are attached to the support beam 31 by welding them to the support beam 31 
Alternatively , the side walls 47 , 38 and { HEAD ~ back wall } 39 of the first pivot mount 40 can be formed with { TAIL ~ one or more pieces } of metal and are attached to the support beam 31 by welding them to the support beam 31
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH