Machines used to dose fluids in the nature of automatic fluid-composition control machines and instruments, dispensers of preset portions of fluids for dosing purposes for laboratory and research purposes, and parts therefor; Machines used to mix fluids for laboratory and research purposes, and parts therefor; Machines used to isolate fluids in the nature of chemical reactors for laboratory and research purposes, and parts therefor; Single-use non-sterile consumable plastic cylinders in the n...