progressive die structure

• 级进模结构

progressive die structure的用法和样例：

例句

1. The structure of the injection mould with automatic thread demoulding by the chain gear transmission is given.
   给出了链轮传动自动脱螺纹注塑模结构。
2. In this paper,a combined pounch structure for plastic forming of work pieces with inner sunken faces is put forward.
   提出一种可用于塑性成形带有内凹曲面工件的组合凸模结构。