The main jobs of this thesis are as followed: 1 the frame of NC bend tube welding jig CAD system is proposed.

论文的主要工作包括以下几个方面：1提出了数控导管焊接夹具CAD系统框架。

youdao

The main jobs of this thesis are as followed: 1 the frame of NC bend tube welding jig CAD system is proposed.

论文的主要工作包括以下几个方面：1提出了数控导管焊接夹具CAD系统框架。

youdao