... hardness&density 3.high precision 4.oem offered 5.pm transmission gear Nantong Runfeng Powder Metallurgy Co., Ltd. is ... mixing--compacting--sintering--resizing--cleaning--vacuum oiling--packing3.material:steel,copper,steel copper,bronze,alloy.4.produce equipment:200T,100T,60T ... used in automobile,motorcycle and many other field.like transmission gear,spur gear,bevel gear,helical gear,sleeve,copper ...