bulk excavation
常见例句
- This article makes introduction from several aspects, e. g. bulk factor control, effective environment excavation, and window & wall area ratio control etc.
文章从控制体型系数，有效挖掘环境及控制窗墙面积比等方面进行了论述。 - During the initial excavation, the tender coal seam workings in deep seam in Nantun Colliery takes on slocking of roof, with breaking-out in bulk coal and surrounding rock failure.
南屯煤矿深部松软煤层巷道，在掘进过程中顶板破碎，伴有大量顶煤冒落且围岩破坏严重。 返回 bulk excavation