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Because resource is atrophic, original pithead 10, already shut 6 now. 由于資源萎縮，原有坑口10個，現(xiàn)已關閉6個。
Conditions at the village contrasted sadly with the training centre.For a start,there were no pithead baths. 鄉(xiāng)村里的條件同培訓中心相比是太差了。首先，沒有浴池。
Conditions at the village contrasted sadly with the training centre. For a start,there were no pithead baths. 鄉(xiāng)村里的條件同培訓中心相比是太差了。首先，沒有浴池。
Conditions at the village contrasted sadly with the training centre. For a start, there were no pithead baths. 鄉(xiāng)村里的條件同培訓中心相比是太差了。首先，沒有浴池。
Three closing of pithead is realized by the technology transformation of safe door with coal electric drill motor. 通過使用煤電鉆電機對副井安全門進行技術改造,實現(xiàn)井口三閉鎖。