The wrench, along with the 19 other objects built by the orbiting 3D printer thus far, will travel to Earth early next year, where engineers will compare the objects with ground samples produced by the same machine before it launched.
The wrench, along with the 19 other objects built by the orbiting 3D printer thus far, will travel to Earth early next year, where engineers will compare the objects with ground samples produced by the same machine before it launched.
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