SUBLEVEL CAVING METHOD EXTRACTS COAL FROM 55-DEG PITCHING SEAM

被引：0
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作者：
GREEN, P
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COAL AGE | 1985年 / 90卷 / 09期
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中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
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页码：86 / &
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