seam annealing造句

• On - line tube seam annealing unit
  直缝焊钢管焊缝退火全套设备
• High frequency induction heating equipment used in on - line tube seam annealing unit
  焊管用单管高频感应加热设备
• Sf - gp - cyp - iii mainly used for surface quenching , welding , metal powder sintering tube seam annealing and metal parts heat penetrating
  主要用于钢铁机械零件的表面淬火钎焊粉末金属的烧结，钢管焊缝的退火，以及金属部件的透热等。