This paper is targeted to the design and manufacture of hydraulic support base boring machine and a shield.

有针对性地设计制造了液压支架的底座镗孔机和掩护梁镗孔机。

youdao

This paper is targeted to the design and manufacture of hydraulic support base boring machine and a shield.

有针对性地设计制造了液压支架的底座镗孔机和掩护梁镗孔机。

youdao