短語(yǔ)詞組短語(yǔ)cave -in prediction 冒頂預(yù)報(bào)stope cave -in 採(cǎi)場(chǎng)冒落tectonic cave -in 搆造塌陷lamb cave -in lamb凹陷cave dwellings in Qingyang 慶陽(yáng)窰洞民居treatment of cave -in 坍塌処理 返回 cave in