... .high precision 4.good strength 5.powder metallurgy auto parts Nantong Runfeng Powder Metallurgy Co., Ltd. is ... --sintering--resizing--cleaning--vacuum oiling--packing3.material:steel,copper,steel copper,bronze,alloy.4.produce equipment:200T, ... sleeve,copper sleeve,sleeve bearing, bushing, bush,pulley,timing pulley,structural parts,components,powder metallurgy parts,nut,auto parts,rotor and stator ...