-
本文以600吨龙门吊为例研究了大型起重机钢结构的焊接制造工艺。
In this paper, 600 tons gantry was studied as an example of the construction process of large-scale crane structure.
youdao
-
本文以600吨龙门吊为例研究了大型起重机钢结构的焊接制造工艺。
In this paper, 600 tons gantry was studied as an example of the construction process of large-scale crane structure.
youdao