A second building block is added to {HEAD ~ the vessel} under {TAIL ~ conditions} that allow the coupling of the first and second building blocks, and the rotor is spun at a speed sufficient to expel the liquid from the vessel 
under
A second building block is added to { HEAD ~ the vessel } under { TAIL ~ conditions } that allow the coupling of the first and second building blocks , and the rotor is spun at a speed sufficient to expel the liquid from the vessel
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH