Piercing mill is the most important equipment on the rolling pipe line,and the frame is the nucleal component of the piercing mill.
孔机轧制钢管的重要设备,而机架孔机的核心组成部。
Piercing mill is the most important equipment on the rolling pipe line,and the frame is the nucleal component of the piercing mill.
孔机轧制钢管的重要设备,而机架孔机的核心组成部。
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