本SAE推荐实践的目的是提供标准，用于确定空调（A/C）系统材料/部件与候选改造制冷剂的兼容性，这些制冷剂旨在取代最初设计使用CFC-12（R-12）的移动A/C系统中的CFC-12（R12）。

The purpose of this SAE Recommended Practice is to provide criteria for determining the compatibility of air-conditioning (A/C) system materials/components with candidate retrofit refrigerants intended to replace CFC-12 (R12) in mobile A/C systems originally designed to use CFC-12 (R-12).