他对角钢孔型轧制的，工字钢轧制和U -型钢轧制等剧做过深入研究。

Roll pass on Angle steel rolling, I-beam rolling and U-section, etc. were intensively studied.

youdao

他对角钢孔型轧制的，工字钢轧制和U -型钢轧制等剧做过深入研究。

Roll pass on Angle steel rolling, I-beam rolling and U-section, etc. were intensively studied.

youdao