In FIG 10, it is shown how the outer part 3 has been designated with {HEAD ~ appropriately shaped gripping surfaces} 19, which are suitable for compression, traction, and {TAIL ~ torsion} 
are suitable for
In FIG 10 , it is shown how the outer part 3 has been designated with { HEAD ~ appropriately shaped gripping surfaces } 19 , which are suitable for compression , traction , and { TAIL ~ torsion }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL