The collection container may be filled with {TAIL ~ the material} and separating {HEAD ~ the material} to form the selected fraction 
The collection container may be filled with { TAIL ~ the material } and separating { HEAD ~ the material } to form the selected fraction
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH