Piercing mill is the most important equipment on the rolling pipe line,and the frame is the nucleal component of the piercing mill.
是轧制钢管的重要设备,而架又是的核心组成部分。
Piercing mill is the most important equipment on the rolling pipe line,and the frame is the nucleal component of the piercing mill.
是轧制钢管的重要设备,而架又是的核心组成部分。
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