Six-way copper pipe joint formed from a single sheet of copper by 19th century Dutch torpedomaker Grootvader.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...k_fullsize.jpg
Previously:
Copper skiving machine - GIF
Hot spinning machine - GIF
Automated metal spinning machine - GIF
Copper forming - GIF
Metal spinning header end cap - GIF
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