Anqing Diamond ( DMD ) piston Ring Joint Co., Ltd., is located in Qianshan Industry District of Anqing city, Anhui province, China , with an area of 18,000 square meters , and built on modern gardens standards . Anqing Diamond is a well imported Japanse & German advanced technology and equipment manufactures . The company is frequently cooperated with experts from Japanese & Germany .At the same time , more and more researchers and qualified technicians are employed . what?¡¥s more , Anqing Diamond is a project supported by researchers and experts from China polytechnic university , Tsing-Hua university & Hefei Industry university etc., who research and produce high quality piston rings and develops multiple most sophisticated technologies. ...