filtration machines and filters therefor; coated and uncoated filters being parts of filtration machines; filter cloths and belt filters for use in machines; polishing machines and parts therefor; polishing belts and polishing pads for use in polishing machines and for polishing silicon wafers; filters presses, for example, plate and frame, recessed plate, membrane, mixed pack and pressure disc filter presses; belt filters such as multiroll belt presses, gravity belt filters; pressure leaf filters, horizontal leaf filters, circular leaf filters; rotary vacuum drum filters, rotary pressure filters, vacuum drum filters; pan filters, disc filters, vacuum disc filters; disc sectors; polishing filters; candle filters; tubular filters; cartridges; filtering and microfiltration membranes; screens and sieves, all for use with vibratory screening (sifting) apparatus and processing apparatus