They are shaved down on a lathe at the end, then tested for conformance. The end...

gefh on Dec 17, 2016 | parent | context | favorite | on: Chinese smiths forge a large flange on the street ...

They are shaved down on a lathe at the end, then tested for conformance. The end product looked very 'high tech'. I don't know if the method has any significant effect on internal defects relative to the safer method though.