Ding Yongjian. CONICAL COLD DRAWING MANDREL WITH TWO PLUGS AND HOLLOW BAR[J]. STEEL PIPE, 1988, 17(3): 39-41.
    Citation: Ding Yongjian. CONICAL COLD DRAWING MANDREL WITH TWO PLUGS AND HOLLOW BAR[J]. STEEL PIPE, 1988, 17(3): 39-41.

    CONICAL COLD DRAWING MANDREL WITH TWO PLUGS AND HOLLOW BAR

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