... 20 years,1,500 kinds of powder metallurgy parts,TS16949,export to Europe,US,etc. Ningbo Kingbell Powder Metallurgy ... , has specialized in manufacturing items of sintered metal components spare parts for 20 years. Kingbell are one of the Designer, Manufacturer ... for Powder Metallurgy parts of following Items.1.) Types of Pistons, Foot Valves, Rod ...