短語(yǔ)詞組短語(yǔ)coal thawing pit 煤的解凍庫(kù)non -coal open pit 非煤露天鑛山water in coal pit 鑛井水small -coal pit 小煤窰ancient coal pit 古煤窰Huachu coal pit 化処鑛井Huojitu excavated coal pit 活雞兔採(cǎi)煤塌陷區(qū)coal pit a surname 煤坑coal pit waste water 鑛井水 返回 coal pit