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掌握罗斯富恩奇图解法求解沥青混合料中组成矿料配比的原理以及矿料间体积比向重量比转换的方法，对指导工程实践有重要意义。同时还要对有关矿料间隙率（VMA）所涉及的问题有明确认识。
It is of great significance to master the principle of Rosemary Encompassing Method to solve the composition ratio of aggregate in asphalt mixture and the conversion of volume ratio to weight ratio between mineral materials. There is also a clear understanding of the issues involved in the VMA.