progressive die structure的用法和樣例：
例句
- The structure of the injection mould with automatic thread demoulding by the chain gear transmission is given.
給出了鏈輪傳動自動脫螺紋注塑模結構。 - In this paper,a combined pounch structure for plastic forming of work pieces with inner sunken faces is put forward.
提出一種可用於塑性成形帶有內凹曲面工件的組合凸模結構。
