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Sulfur is generally regarded as a harmful element in steel , which mainly exists in the form of MnS and FeS, which can cause the thermal br... -
The pipe jacking method for the production of seamless steel pipes was proposed as early as 1892 by Heinrich Erhard in Germany. The perfo... -
Extrusion method refers to the metal billet is placed in a "closed" container composed of an extrusion cylinder, an extrusion die ...