7 Stock preparation machinery for use in the pulp and paper industry, namely, pulpers, detrashing units, screens, screen baskets, pressure screens, hydrocyclone cleaners, flotation cells, counter current washers, strainers, pulp washers, evaporators, recausticizers, condensate stripping machines, stock mixers, deflakers, flotation cells, thickeners, dispurgers, de-aeration tanks, bleachers, oxygen delignifiers, filters, agitators, pressure knotters, kneaders, cutters, roll splitters, dewatering drums, refiners; machinery parts and accessories for use in the pulp and paper industry, namely, doctors, doctor holders, doctor blades, steam foils, automatic tail cutters and doctor oscillators; machines in the nature of screw presses and screen baskets used in the food industry