短語(yǔ)詞組短語(yǔ)cave -in prediction 冒頂預(yù)報(bào)stope cave -in 采場(chǎng)冒落tectonic cave -in 構(gòu)造塌陷lamb cave -in lamb凹陷cave dwellings in Qingyang 慶陽(yáng)窯洞民居treatment of cave -in 坍塌處理 返回 cave in