短語詞組短語Anjialing underground coal mine 安家?guī)X井工鑛underground coal mine staff 煤鑛井下人員underground coal mine well 煤鑛井下Design of Underground Coal Mine 井工鑛underground communication in coal mine 煤鑛井下通信IOT in underground coal mine 煤鑛井下物聯(lián)網(wǎng)underground drainage in coal mine 煤鑛井下排水non -coal underground mine 非煤地下鑛山coal mine underground measurement 煤鑛井下測量 返回 underground coal mine