7 Mineral dressing apparatus and machines, namely, crushing machines, screening equipment, equipment for feeding and crushing, namely, feeder-breakers, gyratory crushers, cone crushers, roll crushers, jaw crushers, hammermills, vertical shaft impactors, mobile crushing stations; semi-autogenous mills and ball grinders machines, namely, SAG mills and ball mills; wet separation machines, namely, hydrocyclones, classifiers, monosizers, hydosizers, DSM screens, bowl desiltors; flotation machines, namely, flotation cells, attrition cells, flash flotation cells, froth flotation machines; hoists for mining; machine parts, namely, bearings; fluid bed drying machines, namely, fluid bed dryers, fluid bed, limestone calcination machines, limestone preheaters; conveyance systems and machines for materials, namely, machines for mining and cement manufacture, namely, conveyor belts for horizontal conveyance, fixed and mobile conveyor belts, elevators for conveyance of raw materials; helical conveyors and pressure conveyors, cranes, namely, cranes for loading and unloading of ships, mechanical and pneumatic conveyors, pendulum conveyors; chain conveyors, feed belt conveyors and tray conveyors; structural parts and fittings for the above goods; accessories for the above goods, namely, bucket conveyors, hydraulic pumps, fans for machine engines; bucket conveyors, hydraulic pumps, fans for machine engines