短語詞組短語coal thawing pit 煤的解凍庫non -coal open pit 非煤露天礦山water in coal pit 礦井水small -coal pit 小煤窯ancient coal pit 古煤窯Huachu coal pit 化處礦井Huojitu excavated coal pit 活雞兔采煤塌陷區(qū)coal pit a surname 煤坑coal pit waste water 礦井水 返回 coal pit