1.1本规范涵盖了用于汽车和轻型车辆的预稀释水性丙二醇（最小体积百分比为50%）基发动机冷却液的要求。当在没有进一步稀释的情况下使用时，本产品在夏季和冬季在汽车和其他轻型发动机冷却系统中有效发挥作用，以提供足够的冷却系统性能。 注1-本规范基于对由新成分或原始成分制备的发动机冷却液性能的了解。详见附录X3。 1.2本规范中引用的单位应视为标准。括号中给出的值是仅供参考的近似等效值。 1.3本标准无意解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。

1.1 This specification covers the requirements for a prediluted aqueous propylene glycol (50 volume % minimum) base engine coolant for use in automobiles and light-duty vehicles. When used without further dilution, this product functions effectively during both summer and winter in automotive and other light-duty engine cooling systems to provide adequate cooling system performance. Note 1-This specification is based on the knowledge of the performance of engine coolants prepared from new or virgin ingredients. See Appendix X3 for more information. 1.2 The units quoted in this specification are to be regarded as standard. The values given in parentheses are approximate equivalents provided for information purposes only. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.