1,tyre mound 2,non-standard forging 3,rough machining 1,we have professional UT center and every year we have less than 2 complaint cases from customers and products qualification rate over 99%. 2,we were certificated to ISO9001:2000 and passed the authentication of "Classification Society". 5,we usualy use material of steel type of 15#,20#,25#,30#.35#,40#,45#,46#,etc.according to customers' ...