In {HEAD ~ Step} 21, the solution containing solid microparticles is continuously pumped into the apparatus 1 for collecting solid microparticles floating in {TAIL ~ water} even after the full water level is reached 
In { HEAD ~ Step } 21 , the solution containing solid microparticles is continuously pumped into the apparatus 1 for collecting solid microparticles floating in { TAIL ~ water } even after the full water level is reached
OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH