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IEC 60027-3 Ed. 3.0:2002 (b)
電気用文字記号-第3部:対数量及び関連量並びに単位
Letter symbols to be used in electrical technology - Part 3: Logarithmic and related quantities, and their units

規格概要
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.
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TC TC 25
ICS 01.060
01.075
備考
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