The utility model relates to a machinery processing equipment, relating to a following retrograded material device of a nc revolving tower typepunch with large tonnage.
本实用新型属于机械加工设备，涉及一种大吨位数控转塔冲床的跟随退料装置。
2
Punch cards were a way to store commands (a type of data, you could say) onto a medium.
穿孔卡片是一种存储命令（一种类型的数据，你可以说）到一个媒介。
3
This paper introduced the working principles of ceramic tile die with static-pressure, structure type of upper punch and method of optimal design.