进一步用Q 235钢管和T2紫铜管等材料进行了扩口试验。

Furthermore, with Q235 steel tube and T2 copper tube, expanding experiments are carried out.

youdao

进一步用Q 235钢管和T2紫铜管等材料进行了扩口试验。

Furthermore, with Q235 steel tube and T2 copper tube, expanding experiments are carried out.

youdao