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