IEC 60027-2A Ed. 1.0被替代
Letter symbols to be used in electrical technology Part 2: Telecommunications and electronics - First supplement
出版：International Electrotechnical Committee
专家解读视频
Chapter V: Quantities concerning waveguide propagation; Chapter IX: Letter symbols for scattering matrix and transfer matrix; Chapter X: Symbols for use in the field of static convectors using tubes or semiconductor devices; Chapter XI: Automatic control science and technology.
SS 401 01 04 Ed. 1 (1978) - Similar
DIN 1304-8 (1994-02) - Identical
DIN 1304-6 (1992-05) - Identical
HD 245.2:1982 - Identical
DIN 19221 (1993-05) - Similar
UTEC 03 002:1982 - Identical
