Safety rules for the construction and installation of lifts - Lifts for the transport of goods only - Part 31: Accessible goods only lifts; German version EN 81-31:2010
Edition 2010-08

Respiratory protective devices - Fresh air hose breathing apparatus for use with full face mask, half mask or mouthpiece assembly - Requirements, testing, marking; German version EN 138:1994
Edition 1994-12

Concept for the design of 3D models based on properties according to DIN 4000 - Part 1: Overview and fundamental principles
Edition 2017-10