{HEAD ~ The third arm} 48, via its lobe section 50, permits linear movement in {TAIL ~ the directions} of the Y axis 
{ HEAD ~ The third arm } 48 , via its lobe section 50 , permits linear movement in { TAIL ~ the directions } of the Y axis
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH