乳突纹线的细节特征是指乳突纹线局部的细小结构,特殊形态及组合结构。传统指纹检验中乳突纹线的细节特征共9种。本文通过对指纹检验应用实践的总结和进一步研究,发现乳突纹线中还有一种特征,表现为某一根或相邻的数根乳突纹线,其原本流畅的走势突然发生变异,我们将这种特征称 The characteristic features of the mastoid lines are the fine structures, the special shapes and the combined structures of the local part of the mastoid lines. The traditional fingerprints in the details of the characteristics of mastoid ridge a total of 9 kinds. In this paper, we summarize and further study the application of fingerprinting test and find that there is another characteristic in the mastoid line that appears as a certain root or adjacent several mastoid lines. The original fluent trend suddenly changes. Weigh this feature