1.1 本规范涵盖三个等级的1,1,2-三氯1,2,2-三氟乙烷 2. 各种行业通常需要。购买者或制定内部1,1,2-三氯-1,2,2-三氟乙烷回收计划的人员可将其用作参考文件。 1.2 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。

1.1 This specification covers the three grades of 1,1,2-trichloro 1,2,2-trifluoroethane 2 typically needed in various industries. It may be used as a reference document by purchasers or by persons establishing in-house, 1,1,2-trichloro 1,2,2-trifluoroethane recovery programs. 1.2 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.