前言 ISO(国际标准化组织)是各国家标准化机构(ISO成员团体)的世界性联合组织。国际标准的制订工作是通过ISO技术委员会进行的。凡对现有技术委员会的某课题感兴趣,成员团体有权参加该委员会。与ISO有联络的政府性及非政府性的国际组织,也可以参加该项工作。技术委员会采纳的国际标准草案在ISO理事会批准为国际标准之前,分发给各成员团体,征求表决意见。 1972年以前,技术委员会工作的结果是以ISO推荐标准发表的,这些推荐标准现 Foreword ISO (International Organization for Standardization) is a worldwide joint organization of national standardization bodies (ISO member groups). The development of international standards is through the ISO Technical Committee. Where there is an interest in a topic from an existing technical committee, member groups have the right to participate in the committee. Government and non-governmental international organizations liaising with the ISO can also participate in the work. The draft international standard adopted by the technical committee is circulated to member groups for approval before being approved by the ISO Council as an international standard. Prior to 1972, the results of the work of technical committees were published under the ISO Recommended Standard, which