The separation chamber is positioned in {TAIL ~ the annularly shaped slot} and rotated at {HEAD ~ a predetermined rotational velocity} 
The separation chamber is positioned in { TAIL ~ the annularly shaped slot } and rotated at { HEAD ~ a predetermined rotational velocity }
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD