He moved the coal cakes away and there was only coal dust left on the floor.

Many ventilation methods have adopted, but no one could bring gas coal dust under control entirely.

虽然采取了许多通风方法, 但是都不能彻底治理综掘工作面的瓦斯、煤尘.

Enclosed case decreases pollution by coal dust.

采用密闭壳体,粉尘污染小.

Lustrous carbon is deemed as technical data for evaluation of coal-dust.

煤粉光亮碳可作为煤粉的技术性能指标.

His face and hands were covered with grime from the coal dust.

他的脸和双手沾满了一层煤灰.

Coal worker's pneumoconiosis results from inhalation of coal dust.

煤尘肺是由吸入煤矿粉尘引起.

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.

He became ill after breathing coal dust for many years.

他因多年吸入煤灰而生病了.

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.

Matthew scrubbed the coal dust from his face.

马修擦掉了脸上的煤灰。

Air leak seriously influences coal face supersedure at second air road of Dongyi mining area.

东一采区二段风道小井漏风严重影响了采煤工作面的接续,制约采区巷道维修.

Coal rock body electric characteristic abnormity of the mine coal face relates coal mine safety production.

矿井工作面煤岩体的电性特征异常关系到煤矿安全生产.

The safe monitoring system on coal face is the nerve of safe production coal mine.

综采工作面的安全监测系统是煤矿生产的神经系统.

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.

Through researching on coal-bearing stratum in Shuanghua coal field, the usual coal formation rules are reviewed.

通过对双桦煤田含煤地层的研究,总结出了双桦煤田的一般成煤规律.

The formation and harm of spontaneous combustion in coal field are generally described.

煤层自燃形成的煤田火区是煤矿区重要灾害之一.

Through analysis on coal formation and system, expound the change regulation of Boli coal field.

通过对含煤建造及构造体系的分析,探讨了勃利煤田的变质规律.

In Zhunnan Jurassic coal-field, the spontaneous combustion of coal very serious, and there are long history.

准南煤田侏罗系煤层自燃严重, 火烧历史悠久.

Coal field burning does great harm to coal exploring, pit building and mine opening-up.

煤田火烧区的存在,给勘探 、 建井、开矿均带来一定的危害.

The coal field at Ying-Ke Station , coal mines around Taipei area were delivered here to transfer.

莺歌车站集煤场.三峡,新店的煤产均集中在此待转.

It is important for assessing to the quality of coal correctly during coal field geological prospecting.

正确评价煤质是煤田地质勘探工作中一项极为重要的工作.