He has worked at the coal face for eight hours.
这矿工在工作面上已经干了八小时了。
The study of dynamic model of dust particle movement in coal face;
为此，开展农业物料颗粒运动规律的系统理论的研究尤为重要。
His face was blacked with coal.
他的脸被煤弄黑了。
His face and hands were covered with grim of coal dust.
他的脸和双手都沾满了煤炭的污垢。
His face was blackened with coal.
他的脸被煤弄黑了。
His face and hands were coverd with grime from the coal dust.
他的脸和双手都沾满了煤灰和污垢。
The application of simple hydraulic prop in the face of small coal mine is expounded.
阐述了单体液压支柱在小型煤矿工作面支护中的应用。
煤渣将他的脸擦破了一层皮。
All coal was moved from the work face by electrically-driven conveyors.
所有的煤都用电动传送带从工作面运出来。
As Daihe Coal Mine stope and often face a lack of time for the equipment.
岱河煤矿是衰老矿井，由于受采场限制，常常出现没有时间装面的情况。
Fully-mechanized Coal Winning is difficult in the production with complex working face.
综合机械化开采对构造复杂工作面生产具有较高的要求。
Fully-mechanized Coal Winning is difficult in the production with complex working face.
综合机械化开采对构造复杂工作面生产具有较高的要求。
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