6
silos and other bins made of metal; metal pipes, metal slides
7
conveyors for powdered and granulated bulk materials; namely, vacuum-type, rotating screw or belt-type conveyors; mixing machines for the mixing and homogenizing of granulated or powdered materials; extracting machine for the extraction of test samples or granulated or powdered materials stored in silos or bins; valves; namely, slide valves, flap valves, diverter valves, and rotary valves and air filters forming part of the aforesaid machinery; pumps and blowers for the pressure-conveying of granulated, powdered and fluid materials through pipes, tubes and hoses; air compressors; mechanical dust collectors; and mechanical elutriators
9
dosing units; level indicators; weighing units, consisting essentially of auxiliary equipment for conveyors; electric controls for conveyors
11
combination heating, cooling and drying units for use in the mixing and homogenizing of grains; electric ventilating fans, dust separators in the nature of filters
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