{HEAD ~ Multi head machines} are assembled in accordance with the number of grinding heads on {TAIL ~ the basis} of frame modules which are similar in shape 
{ HEAD ~ Multi head machines } are assembled in accordance with the number of grinding heads on { TAIL ~ the basis } of frame modules which are similar in shape
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH