• Welding and cutting in 1949, Beijing has geo-drilling, electric welding and cutting etc oxyacetylene flame manual operation.

    焊接切割1949年,北京已有气焊、弧焊氧乙炔火焰切割手工作业。

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  • If oxyacetylene flame or plasma is adopted, surface coat that can impact welding quality shall be removed after cutting.

    采用氧乙炔等离子切割时,切割必须除去影响焊接质量的表面层。

    youdao

  • If oxyacetylene flame or plasma is adopted, surface coat that can impact welding quality shall be removed after cutting.

    采用氧乙炔等离子切割时,切割必须除去影响焊接质量的表面层。

    youdao

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