此文介绍了连续挤压内凸筋口琴管模具的设计方法及其模具芯头的冷挤压加工。
This paper is about die tongue making: the design method and cold-press formation.
导柱外表面自上而下呈与弧形内凸头配合的波浪状。
The outer surface of the guide post is in a wavy shape matched with the arc-shaped inner concave head form top to bottom.
施肥箱下方的下肥道内贯穿有控制杆，上端设有凸头，达接在施肥箱内的出口上。
A control lever runs through a lower fertilizer passage below the fertilization box, with the upper end provided with a raised head which reaches an exit inside the fertilization box.
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