STL InputSave PDFSave selected topicSave selected topic and subtopicsSave all topicsShareShare to emailCopy topic URLLast UpdatedJan 24, 20231 minute readEngineeringE3D DesignUnified EngineeringE3D Design (Unified Engineering) Describes the mechanical CAD systems and STL files production and units and scalar factors. Related LinksMechanical CAD Systems and STL File ProductionUnits and Scalar Factors