DIN ISO 7258:1987 Aerospace; polytetrafluoroethylene (PTFE) tubing for aerospace applications; methods for the determination of the density and relative density; identical with ISO 7258, edition 1984
1987DIN ISO 7258:1987-02 Aerospace; polytetrafluoroethylene (PTFE) tubing for aerospace applications; methods for the determination of the density and relative density; identical with ISO 7258, edition 1984
1987DIN ISO 7258:1987 Aerospace; polytetrafluoroethylene (PTFE) tubing for aerospace applications; methods for the determination of the density and relative density; identical with ISO 7258, edition 1984