The standards for plotting out the economic recoverable reserves of coal and the main effect factors and significance are expounded.
阐述了经济可采储量划分的标准、主要影响因素及意义。
2
Combined 25 Fai green rock walls altogether , there are 20 in the coal seam recoverable range among them.
共组合25条辉绿岩墙，其中20条分布在煤层可采范围内。
3
The utility model belongs to the technical field of the coal mine tunnel safety support. Concretely speaking, the utility model relates to an adhesive type recoverable plastic anchor stock.