
Fasteners. Clearance holes for bolts and screws
出版:British Standards Institution

专家解读视频
© British Standards Institution 2013
UNE EN 20273:1992 - Identical
SS EN 20273 Ed. 1 (1992) - Identical
ISO 273:1979 - Identical
UNI EN 20273:1992 - Identical
NF EN 20273:1992 - Identical
I.S. EN 20273:1992 - Identical
NBN EN 20273:1992 - Identical
DIN EN 20273 (1992-02) - Identical
ONORM EN 20273:1992 - Identical