大倾角坚硬顶板较薄厚煤层综放面初采常见事故及防范措施

大倾角坚硬顶板较薄厚煤层综放面初采常见事故及防范措施的英文翻译

基本释义

• Common fault and countermeasure of elementary mining in top-coal caving face with big dip and hard roof and thick seam