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