... , gasket, filling, gear wheel, bolt, nozzle, axle, sleeve transmission gear,metal screen backing,pipe,flange,blender ... ongeneral machineryself-lubricating,anti-friction,anti-impactimpeler pulley,bush,axle sleeve spacer,sealing spacer , slide guide plate ... tug boatmine machineryanti-friction,anti-impactball mill lining, flotation machine impeller, cover plate,cutting machine ...