Study on the technology of decreasing ash and sulfur in coking coal concentrate by deep-cleaning;
(炼)焦煤深度降灰脱硫的研究
Reserves,production,and utilization of main coking coal mining areas in China;
中国主要(炼)焦煤矿区的储量、产量和利用
The discussion of mechanical sampling for coking coal;
(炼)焦煤机械化采样方法的探讨
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