... piston, base valve, pistion rod guide. TS16949 Ningbo Kingbell Powder Metallurgy Co., Ltd. is a Sintered Metal Structure Parts factory, ... 1988. Kingbell registered a sino-foreign joint venture---Ningbo Yongtai Powder Metallurgy Co., Ltd. in Feb. 2006. Kingbell/Yongtai specializes ... ,2008,we have the certificate TS16949. Ningbo Kingbell/Yongtai Powder Metallurgy Co., Ltd. has the total assets of 30 ...