I.S. EN 28233:1991现行
Thermoplastics Valves - Torque - Test Method
出版：National Standards Authority of Ireland
专家解读视频
Specifies a test method for the determination of the opening and closing torque of thermoplastics valves.
EN 28233:1990 - Identical
SS EN 28233 Ed. 1 (1991) - Identical
UNE EN 28233:1992 - Identical
ISO 8233:1988 - Identical
UNI EN 28233:1993 - Identical
NF EN 28233:1991 - Identical
NBN EN 28233:1992 - Identical
BS EN 28233:1992 - Identical
DIN EN 28233 (1991-06) - Identical
ONORM EN 28233:1991 - Identical
