piercing die造句怎么写

The extrusion and piercing die was developed based on the technical analysis on the shaping characteristics of deep taper pipe with hole.

Piercing technology for oblique holes on conical surface was analyzed and a new piercing die structure for the conical part was introduced.

Wedge mechanism was adopted in piercing die to achieve side piercing, and the positioning of taper pipe depended upon the conical surface of blanking die itself.

Sliver strip melt piercing die and manual feeding mechanism are introduced, the design and manufacture of die key parts are analyzed, as the result, working efficiency gets improved.