Tianjin Yong Ju International Trade Co., Ltd. specializing in the production of D-type ring, short delivery time, quality and cheap, can be customized according to customer demand, if necessary, please contact us 

 Tianjin Yong Ju International Trade Co., Ltd. has been achieved ISO9001 quality management system certification, GS certification, CE certification, China Classification Society CCS, the ABS American Bureau of Shipping, Det Norske Veritas DNV, etc. a number of well-known international classification society inspection and certification , scope of business related to the CNPC, Sinopec, CNOOC, Tianjin Port, shipyards, steel metallurgy, Space Research Institute, nuclear power, the Three Gorges Project, offshore wind power and other state-level enterprise projects. 

 Tel :022-66,206,633 QQ: 2,531,668,046 Contact: Shen manager.