Qiu Yongtai. Development course of the plug pipe mill——Commemorating the 120th anniversary of invention of the rotary piercing process by Mannesmann Brothers[J]. STEEL PIPE, 2005, 34(1): 51-54.
    Citation: Qiu Yongtai. Development course of the plug pipe mill——Commemorating the 120th anniversary of invention of the rotary piercing process by Mannesmann Brothers[J]. STEEL PIPE, 2005, 34(1): 51-54.

    Development course of the plug pipe mill——Commemorating the 120th anniversary of invention of the rotary piercing process by Mannesmann Brothers

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