• 1. negative additive function: 非负的加性函数
• 2. non-negative additive function: 非负的加性函数

• 1.This text introduced the function and mechanism of the negative ion of opal additive. The production process, application result and its outlook of the negative ion textiles were described.
  介绍了蛋白石负离子添加剂的作用和功能、负离子纺织品的生？工艺、负离子纺织品的应用效果，并对负离子纺织品的应用前景进行了展望。
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