... &density 3.high precision 4.oem offered 5.PM transmission gear Nantong Runfeng Powder Metallurgy Co., Ltd. is specializing ... --vacuum oiling--packing3.material:steel,copper,steel copper,bronze,alloy.4.produce equipment:200T,100T,60T,25T,15T,10T ... in automobile,motorcycle and many other field.like transmission gear,spur gear,bevel gear,helical gear,sleeve,copper sleeve,sleeve bearing, bushing, bush ...