1.1 本规范涵盖二甲苯 p -二甲苯原料。这些二甲苯通常从重整物中提取。 1.2 以下内容适用于本规范中的所有规定限度:为了确定是否符合本规范，应根据实践中的四舍五入方法，将用于表示质量标准限度的最后一个右手数字中的观测值或计算值四舍五入至“最接近的单位” E29什锦 . 1.3 以SI单位表示的值将被视为标准值。括号中给出的值仅供参考。 1.4 查阅什麽样什麽样什麽样的什麽样什麽样的材料？什麽样的？ 1.5 本国际标准是根据世界贸易组织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的标准化原则制定的贸易技术壁垒委员会。

1.1 This specification covers xylenes for p -xylene feedstock. These xylenes typically are extracted from reformate. 1.2 The following applies to all specified limits in this specification: for purposes of determining conformance with this specification, an observed value or calculated value shall be rounded off “to the nearest unit” in the last right hand digit used in expressing the specification limit, in accordance with the rounding-off method of Practice E29 . 1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. 1.4 Consult current OSHA regulations, suppliers’ Safety Data Sheets (SDS), and local regulations for all materials used in this specification. 1.5 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.