• 史密斯第一步制造拉模板一种钻有大小不同圆锥形窟窿钢板可以逐渐使铁丝达到要求的粗细

    Harding commenced by manufacturing a drawplate, that is to say, a plate of steel, pierced with conical holes of different sizes, which would successively bring the wire to the wished-for tenacity.

    youdao

  • 史密斯第一步制造拉模板一种钻有大小不同圆锥形窟窿钢板可以逐渐使铁丝达到要求的粗细

    Harding commenced by manufacturing a drawplate, that is to say, a plate of steel, pierced with conical holes of different sizes, which would successively bring the wire to the wished-for tenacity.

    youdao

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