1、INTERNATIONAL TELECOMMUNICATION UNION)45G134 “ TELECOMMUNICATIONSTANDARDIZATION SECTOROF ITU-%!.3G0G0/ this systemis based on the rationalized form of electromagnetic and electrotechnical relations; the letter symbols adopted in the SI system; rules similar to those of the SI system when it is neces
2、sary to form names of other units and their symbolsin the field of telecommunications.Note References of relevant publications (updated in 1988).BIPM publications: “BIPM Publication: Le systme international dunits” (SI).2)International Standard ISO 31: “General principles concerning quantities, unit
3、s and symbols”Parts of International Standard ISO 31 of greatest interest for the telecommunications:0 (General principles)I (Quantities and units of space and time)II (Quantities and units of periodic and related phenomena)V (Quantities and units of electricity and magnetism)VI (Quantities and unit
4、s of light and related electromagnetic radiations)VII (Quantities and units acoustics)XI (Mathematical signs and symbols)International Standard ISO 1000: “SI units and recommendations for the use of their multiples and of certainother units”IEC Publication 27: see Recommendation B.1See also ISO Stan
5、dards Handbook 2 (1982) “Units of measurement”._1)The text of this Recommendation is analogous to that of Recommendation 430-2 of the CCIR.2)The English translation of this publication is published under the title: “The International System of Units”, Her MajestysStationery Office, London, 1970, and “The International System of Units”, U.S. National Bureau of Standards, SpecialPublication 330, U.S. Government Printing Office, Washington, DC, 1970.
