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
。
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。
：以上例
、词性分
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