The rolling experiment with lead as blank material is made in D51-160A hot ring rolling mill and the qualified pre-rolled ring of conical ring with inner steps is rolled.
采用铅环件试样在D51- 160A热轧环机上进行轧制实验，轧制出了合格的内台阶锥形环件预轧制环件。
The rolling experiment with lead as blank material is made in D51-160A hot ring rolling mill and the qualified pre-rolled ring of conical ring with inner steps is rolled.
采用铅环件试样在D51- 160A热轧环机上进行轧制实验，轧制出了合格的内台阶锥形环件预轧制环件。
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