Six-way copper pipe joint formed from a single sheet of copper by 19th century Dutch torpedomaker Grootvader.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...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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