9 Laboratory Scale, 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, and Parts Thereof