The third arm has at least one resiliently deformable lobe section between its distal and proximal ends to allow movement of the proximal end relative to {HEAD ~ the distal end} of {TAIL ~ the third arm} 
The third arm has at least one resiliently deformable lobe section between its distal and proximal ends to allow movement of the proximal end relative to { HEAD ~ the distal end } of { TAIL ~ the third arm }
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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL