• The paper involves an investigation into the new steel pipe manufacture technology of roller die drawing with the two-stand Y type three-high mill.

    研究了利用二连式Y辊辊钢管生产技术

    youdao

  • The paper involves an investigation into the new steel pipe manufacture technology of roller die drawing with the two-stand Y type three-high mill.

    研究了利用二连式Y辊辊钢管生产技术

    youdao

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