DIN EN 28233:1991-06 Thermoplastics valves; torques; test method (ISO 8233:1988); german version EN 28233:1990 / Note: To be replaced by DIN EN ISO 8233 (2020-09), DIN EN ISO 8233 (2023-02).
1991DIN EN 28233:1991-06 Thermoplastics valves; torques; test method (ISO 8233:1988); german version EN 28233:1990 / Note: To be replaced by DIN EN ISO 8233 (2020-09), DIN EN ISO 8233 (2023-02).
1991DIN EN 28233:1991 Thermoplastics valves; torques; test method (ISO 8233:1988); german version EN 28233:1990