... manufacture of oil chemical industry forging• 3 workshops occupie20000 square meters, one is gear workshop, the second one ... one is machining workshop• Price• Country of Origin• Quality Approvals• Form E/F/A/B;CO;FTA,ETC• ... less than 2 complaint cases . 2, material of steel type of 15#,20#,25#,30#.35#,40#,45 ... processing on giving materials. 5, excellent heat treatment. High quality steel rail wheel