laboratory scales, electrical, scientific and testing equipment for laboratory use comprising attrition scrubbers for scrubbing, polishing and removing surfaces from solids, classifiers for fine sizing, desliming, grinding, regrinding, washing, dewatering and densifying, samplers, concentration tables for concentrating solids by size or weight, conditioners for conditioning pulps and for conditioning feed materials to filtering apparatus, crushers for crushing mineral, coal and chemical solids, mills for preparing laboratory samples, pulp density scales, sample splitters, samplers, sieves and sieve shakers, solvent extraction units, vanning plaques, vibrating screens, wet and dry feeders, wet and dry screen analyzers, magnetic separators, particle size monitors, refractory measurement units; machines and machine parts for mineral, coal and chemical processing, namely agitators; thickeners; tube presses; conditioners for conditioning pulps; crushers for crushing filters; drum filters; pressure filters; vacuum filters; flotation cells; gold placer extracting machines; impellers; milling machines; propellers for processing machines; pumps for transporting liquids and slurries; attrition scrubbers for scrubbing, polishing and removing surfaces from solids; slakers for mineral processing; plastics and rubber in the form of shaped sections for manufactures, namely, pump insulation, liners and seals; environmental control apparatus comprising belt filters; disc filters; drum filter; pressure filters and vacuum filters; clarifiers; heat exchangers; mobile filtration stations for dewatering
