underground coal mine
短語詞組
- 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