When the shrinkage of the rod fracture surface much more than that of the cup part fracture surface, its formation by compound extrusion is not applicable.
当杆的断面收缩率比杯形部分断面收缩率大得较多时，不适合直接用复合挤压成形。
2
The rod is made of the particulates by vacuum hot press and thermal extrusion.
采用真空热压技术和热挤压技术，将颗粒制成了试验棒材，测试了材料的力学性能。
3
Taking the model S6120 air compressor as an example, this paper presents the cold extrusion process of connecting rod bushes and measures for improving the tools used in the process.