IEEE/ASTM SI 10-2002 国际单位制(SI)使用的ANSI标准:现代米制

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标准号:IEEE/ASTM SI 10-2002
中文标准名称:国际单位制(SI)使用的ANSI标准:现代米制
英文标准名称:Use of the International System of Units (SI): The Modern Metric System
标准类型:A50
发布日期:1999/12/31 12:00:00
实施日期:1999/12/31 12:00:00
中国标准分类号:A50
国际标准分类号:01.060
适用范围:The International System of Units is the form of the metric system that is generally in use around the world.This document gives guidance for the use of this system. It is the primary American National Standard forconformity to the International System of Units (or the SI, as it is abbreviated from its name in French,LeSystème International d’Unités).Any measurable quantity can be represented in this system with the aid of just seven “base” units, useddirectly for the quantities length, mass, time, electric current, temperature, amount of substance, andluminous intensity, or by combinations (called “derived” units) of these seven. For example, the unit ofspeed can be expressed by the unit of length divided by the unit of time. The SI is a complete and coherentsystem.This standard shows first the two classes of units (base and derived) that make up the SI, together with thesymbols by which they are known. Prefixes that allow the formation of decimal multiples and submultiplesare explained. Then come notes on the proper use of the SI units and symbols in many applications.In the first Annex are lists of many units from non-SI systems with the appropriate SI units that should besubstituted and numerical conversion factors. Other annexes include rules for conversion and rounding, adiscussion of the advantages of SI units with definitions where appropriate, a history of the development ofthe system, and a bibliography of source documents.

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