Permeability of coal bed is one of the critical factors involving coal bed structure and development of cleating.
其中煤层的渗透性是关键因素之一,包括煤体结构和割理发育程度两个方面。
The structure and development of the peripheral lymphoid tissues of Silky fowl were investigated by light microscope.
在光镜水平上,以部分组织器官为对象,对乌骨鸡外周淋巴组织的发生和结构进行了研究。
The first chapter introduces DSP's characteristics, performance index, hardware structure and development tools of software.
第一章介绍了DSP的特点、性能指标、硬件结构及软件开发工具。
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