IEC 60027-3 Ed. 3.0现行
Letter symbols to be used in electrical technology Part 3: Logarithmic and related quantities, and their units
出版：International Electrotechnical Committee
专家解读视频
Applies to logarithmic quantities and units. Quantities that can be expressed as the logarithm of a dimensionless quantity, such as the ratio of two physical quantities of the same kind, can be regarded and treated in different ways. In many cases, differences do not affect practical treatment.
NEN IEC 60027-3:2002 - Identical
UNE 21405-3:1994 - Identical
OVE/ONORM EN 60027-3:2007 - Identical
PN EN 60027-3:2007 - Identical
PN HD 60027-3:2006 - Identical
HD 60027-3:2004 - Identical
NEN EN IEC 60027-3:2007 - Identical
UNE EN 60027-3:2007 - Identical
NFC 03 003:2003 - Identical
NBN EN 21683:1995 - Identical
I.S. EN 60027-3:2007 - Identical
DIN 5493-1 (1993-02) - Identical
NF EN 60027-3:2007 - Identical
SS IEC 60027-3 Ed. 2 (2004) - Identical
HD 245.3:2001 - Identical
DIN IEC 60027-3 (2004-07) - Identical
DIN EN 60027-3 (2007-11) - Identical
BS 7998-3:2002 - Equivalent
CEI 25-9 Ed. 1 (2005) - Identical
CEI EN 60027-3 Ed. 1 (2007) - Identical
BS EN 60027-3:2007 - Identical
I.S. HD 60027-3S1 (Duplicate Record) - Identical
NEN HD IEC 60027-3:2001 - Identical
DIN 5493 (1982-10) - Similar
UTEC 03 003:1981 - Identical
SS 401 01 13:1980 - Similar
SN HD 245.3:2001 - Identical
