The sizing process must be taken in order to eliminate the size tolerance and roundness one after the seamless pipe rolled and heat treated.

 
  • 為消除無(wú)縫鋼管的軋制和熱處理所產(chǎn)生的尺寸和橢圓度誤差等缺陷,一般要采用定徑工藝。
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