inclined longwall comprehensive mechanized mining
...煤柱；倾斜长壁综采；搭接 [gap=873]keywords: mining with coal pillars; inclined longwall comprehensive mechanized mining; jiont ...
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inclined longwall comprehensive mechanized mining
倾斜长壁综合机械化开采
以上为机器翻译结果，长、整句建议使用 人工翻译 。