... less than 2 complaint cases from customers and products qualification rate over 99%.(5),we were certificated to ISO9001:2000 and ... passed the authentication of "Classification Society".(6),we usualy use material of steel type of 15#,20#,25#,30#.35#,40#,45 ... 15CrNiMo,20CrNiMo,35CrMo,40CrNiMo,etc.(8),regularly,we accept processing on giving materials.(9),we generally produce forging blank with ...