Stock Photo - ILLUSTRATION - 10 July 2019, Berlin: A Deutsche Bahn employee tightens a screw on a component produced in a 3D printer at a press event. Deutsche Bahn now also uses 3D printing for metal parts relevant to its operations. About five percent of all spare parts are to be produced in this way by the suppliers in the future, the Bahn announced in Berlin. Photo: Paul Zinken/dpa. - Berlin/Berlin/Germany

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