Will study summary especially in different orifice group for precision condition take off , implement single surface to weld the two-sided shape technical and technology effect of welding thoroughly.
特别要研究总结在不同管口组对精度条件下，实施单面焊双面成形根焊的技术和工艺效果。
Will study summary especially in different orifice group for precision condition take off , implement single surface to weld the two-sided shape technical and technology effect of welding thoroughly.
特别要研究总结在不同管口组对精度条件下，实施单面焊双面成形根焊的技术和工艺效果。
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