... Manganese,40 Chromium and 45#steel etc .4,Every parts of our products that pins ,axles,sleeves etc are ... strictlyobey quenching and tempering procedures .5,Every parts of our products strictly conforms to the procedurerequirements : mill ,plane ... contactor is fromSchneider or Siemens. The operating system is a high-quality product (Schneider integrated pellet ) ,which provided by Sanmen ...