RRB的音标

When either of the two indexes is used the characteristic particle size and uniform coefficient of RRB distribution curve should be controlled, and the particle size distribution of cement should be controlled and periodic inspected.

但无论用二者中哪一个控制都还应该对RRB分布曲线的特征粒径x'和均匀性系数n进行控制，并定期检查和控制水泥的粒度分布。

10 periods of low RRb/ Sr are identified, which well agree with periods of lower temperature in China's history, and the lower temperature during about 990 AD is verified.

该曲线揭示出10次RRb/Sr低值时期，它们与历史时期中国温度下降有很好的对应关系，并印证了约990AD的降温事件。

The problems occurred when equation RRB is used to describe the multi-peak particle size distribution of cement have been discussed and the solution suggestion has been put out.

从RRB式模型来源、分布特点及应用方式等方面入手，探讨了RRB式在描述多峰状水泥颗粒分布时存在的问题，并提出了解决这类问题的建议。