The controlled roles of coal- accumulation by paleostructure and paleogeography and sedimentary environment have been explained, through analysis and study of Late Paleozoic coal- bearing strata in Ningxia Region.
通过对宁夏晚古生代含煤岩系的分析研究,阐述了古构造、古地理、沉积环境对煤层聚积的控制作用。
Computer automatic measuring system of gas volume fraction;
气体的体积分数计算机自动测试系统
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