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The 500 samples of the spherical and cutting wear particles were collected by each of the following three ways: the test, the field collection, and the photo of wear particles.

选取 FAENA法作为计算磨粒分形维数方法 ,用试验法、现场收集和磨粒相片 3种方法收集了球形磨粒和切削磨粒各 5 0 0个样本 ,并进行了轮廓分形维数计算 。