Transformation of metal from slug shape to tube shape by the impact extrusion process does mot involve any assembly of parts in the fabrication of collapsible tubes.
Transformation of metal from slug shape to tube shape by the impact extrusion process does mot involve any assembly of parts in the fabrication of collapsible tubes.
在制作(装)膏状物小(金属)管过程中，将条状(或是块状)的金属通过冷挤压转化为管状的工序并不包含任何零件的装配。