{HEAD ~ The clutching arms} are symmetrically mounted on {TAIL ~ the main body} by the fixing plates thereof fixed on two opposite sides of the main body 
are symmetrically mounted on
{ HEAD ~ The clutching arms } are symmetrically mounted on { TAIL ~ the main body } by the fixing plates thereof fixed on two opposite sides of the main body
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH