英语词典
Analysis for small cross section of short piles to drive into the shallow hard stratum
浅埋硬土层小截面短桩沉桩分析
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the main key stratum that is made up of the hard stratum covering over the coal seam has a great influence on rock burst.
煤层上覆坚硬厚层岩层组成的主关键层对冲击矿压的发生具有强烈的影响。
construction technology of trench for diaphragm wall in the upper soft and lower hard stratum
上软下硬地层地下连续墙成槽施工
application of sand casing drilling method in alternate soft and hard stratum
软硬交替岩层中投砂钻进法的应用
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