ISO 2540:1973被替代
Centre drills for centre holes with protecting chamfer - Type B
出版：International Organization for Standardization
专家解读视频
NFE 60 051:1983 - Similar
DIN 332-1 (1986-04) - Identical
DIN 333 (1986-04) - Identical
UNI 3220:1974 - Equivalent
UNI 3223:1974 - Equivalent
NBN E 60 001:1983 - Identical
NBN E 66 111:1983 - Identical
AS 1913-1976 - Equivalent
BS 328-2:1972 - Identical
NS 1917 Ed. 2 (1974) - Identical
NF ISO 2540:2004 - Identical
JIS B 4304:2005 - Identical
NEN ISO 2540:1978 - Identical
GB/T 6078.2-1998 - Identical
KS B ISO 2540:2013 - Identical
KS B ISO 2540:2003 - Identical
