These images show the spacer barrel for NASA's SLS (Space Launch System), which will be used for the Artemis III mission. Inside a high-bay manufacturing facility at NASA's Marshall Space Flight Center in Huntsville, Alabama, the large silver barrel stands vertically after technicians completed the eighth and final friction stir weld joining its eight panels. Blue and yellow platforms, scaffolding, and specialized welding equipment surround the large piece of hardware.图：NASA · NASA Image and Media Guidelines
