... circular seam welding ==> 环缝对接焊 circular seam-welding machine ==> 环形滚焊机 circular section ==> 圆弧形截面 ...
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circular r seam-welding machine 环形滚焊机
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The invention discloses a circular seam welding machine for fixed pipes, which relates to the improvement on circular seam welding machines for large pipes.
不动管环缝焊接机是涉及大型管件环缝焊接机的改进。
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