NS EN 2257 Ed. 1 (1997)现行
Aerospace Series - Circular Tubes For Structures In Aluminium And Aluminium Alloys - Diameter 6 Mm Less Than D Less Than 100 Mm - Thickness 1 Mm Less Than A Less Than 6 Mm - Dimensions
出版：Norwegian Standards (Norges Standardiseringsforbund)
专家解读视频
Defines dimensions and tolerances of circular tubes for structures in aluminium and aluminium alloys, of diameter 6 mm <-D<- 100 mm, thickness 1 mm <-a <- 6 mm, for aerospace applications.
I.S. EN 2257:1997 - Identical
SS EN 2257 Ed. 1 (1997) - Identical
UNE EN 2257:1997 - Identical
NEN EN 2257:1997 - Identical
BS EN 2257:1997 - Identical
DIN EN 2257 (1997-03) - Identical
ONORM EN 2257:1997 - Identical
NBN EN 2257:1997 - Identical
NF EN 2257:1997 - Identical
UNI EN 2257:1997 - Identical
