As will be seen, the two arms 30 and 38 permit movement in five of {HEAD ~ the degrees} of {TAIL ~ freedom}, linear along the Z and X axes and rotation about the X, Y and Z axes 
of
As will be seen , the two arms 30 and 38 permit movement in five of { HEAD ~ the degrees } of { TAIL ~ freedom } , linear along the Z and X axes and rotation about the X , Y and Z axes
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH