According to the invention, {HEAD ~ the centrifuge} further comprises {TAIL ~ a means} for controlling the progress of the sample separation is located at the chamber 
comprises
According to the invention , { HEAD ~ the centrifuge } further comprises { TAIL ~ a means } for controlling the progress of the sample separation is located at the chamber
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH