短語(yǔ)詞組短語(yǔ)Anjialing underground coal mine 安家?guī)X井工礦underground coal mine staff 煤礦井下人員underground coal mine well 煤礦井下Design of Underground Coal Mine 井工礦underground communication in coal mine 煤礦井下通信IOT in underground coal mine 煤礦井下物聯(lián)網(wǎng)underground drainage in coal mine 煤礦井下排水non -coal underground mine 非煤地下礦山coal mine underground measurement 煤礦井下測(cè)量 返回 underground coal mine