常見(jiàn)例句雙語(yǔ)例句The determination of damage height of superincumbent stratum of goaf has immense meaning for safety and reasonable exploitation of coal seam under water body, building and railway.確定采空區(qū)上覆巖層破壞高度，對(duì)“三下”煤層安全、高效開(kāi)采具有重要意義。chazidian.com 返回 superincumbent stratum