接着阐述了CO_2焊接的特点、目前国内外的研究现状。

The important specialties of CO2 welding machine and its study evolution are follow set forth.

youdao

接着阐述了CO_2焊接的特点、目前国内外的研究现状。

The important specialties of CO2 welding machine and its study evolution are follow set forth.

youdao