肋纹cast 存在于毛滴虫属{ Trfclaomonas)各种的一种深染色的弯汗〔内骨骼?)，位置上相当于波动膜的近侧的界限。
在不稳定肋状区发现到裂纹在霉纹区和肋状区的扩展机理是可以相互转化的。
It was observed on unstable rib that the crack propagation mechanisms in both mist and rib regions may transfer into each other.
发现断面形态、裂纹路径以及肋状区裂端簇射状银纹群之间有直接联系。每一肋条由一细砂带和一粗破带构成。
It was observed that there was a direct connection between the fractographs, the fracture path and the crack tip crazes or microcracks in rib region.
分别测量了离析后叶中肋细胞的长度、宽度和细胞壁厚度及纹孔场数目。
The length and width of cells, the thickness of cell walls and numbers of pit fields of the leaf costa were measured.
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