闫飞宇

Symmetrical-wheel spinning tool

韩冬, 曲中兴, 尚勇, 2013 .

The method of processing the metal shell when the outer clamping member

袁伟, 张海峰, 张英, 2013 .

Kind of spinning wheel tooling

韩冬, 曲中兴, 尚勇, 2013 .