I was unaware of this welding process but apparently it's been around for awhile:
SpaceX used the same process for the Falcon 1 and now a new machine will be used for the heavy lift rocket:
NASA unveils new welding equipment at Michoud Assembly Facility in eastern New Orleans | NOLA.com
SpaceX used the same process for the Falcon 1 and now a new machine will be used for the heavy lift rocket:
NASA unveils new welding equipment at Michoud Assembly Facility in eastern New Orleans | NOLA.com
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