... Design characteristicsOuter ring of carbon chromium steel,fractured,hardened and phosphated,with two seals at both sides,with sliding ... Parts Co., Ltd., Changsha Bode Metallurgic Material Co., Ltd and Zhangzhou Jintian Machinery Co., Ltd,. The annual production capacities are ... ,Chinese Academy of Science’s Electron Positron Collider, aerospace and other modern architectures and bridges. Workshop