The shortwall ladder prop mining method namely strip extraction has been more extensively applied currently in small coal mine of Shaanxi province.
短壁刀柱采煤法即条带开采,目前在陕西省小煤矿开采中较广泛应用。
The shortwall ladder prop mining method namely strip extraction has been more extensively applied currently in small coal mine of Shaanxi province.
短壁刀柱采煤法即条带开采,目前在陕西省小煤矿开采中较广泛应用。
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