For the rolling granulation, {HEAD ~ a granulator} such as a pan granulator and {TAIL ~ a drum granulator} may be used 
such as
For the rolling granulation , { HEAD ~ a granulator } such as a pan granulator and { TAIL ~ a drum granulator } may be used
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH