英语语法分析

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

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。

Make the inserting block stretch out to the Angle steel of guiding track framework, and can draw back reliably.

使插块灵活可靠地伸出到导轨架标准节角钢上，并能可靠缩回。

The suspension coop is welded by the Angle steel and channel steel.

吊笼由角钢和槽钢焊接而成。