包雅星

Full automatic pipe cutting machine

李东升, 包雅星, 申素琴, 2011 .

Workbench of automatic tube-cutting machine

包雅星, 申素琴, 李东升, 2011 .

Pipe fitting clamping mechanism of full-automatic pipe cutting machine

李东升, 包雅星, 申素琴, 2011 .