B PERFORMING OPERATIONS; TRANSPORTING
B01 PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
B01L CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
B01L2200/00 Solutions for specific problems relating to chemical or physical laboratory apparatus
B01L2200/06 Fluid handling related problems
B01L2200/0647 Handling flowable solids, e.g. microscopic beads, cells, particles
B01L2200/0668 Trapping microscopic beads