济三煤矿6302工作面初次放顶矿压观测分析研究濟三煤礦6302工作麵初次放頂礦壓觀測分析研究 제삼매광6302공작면초차방정광압관측분석연구 Analysis and research on first caving pressure observation in No.6302 working face No.3 Jining Coal mine
万方数据
山东煤炭科技山東煤炭科技산동매탄과기 Shandong Coal Science and Technology 2004年1期48-49,共2页