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- coal dust layer 煤尘层
- His face and hands were covered with coal dust. 他的脸和双手沾满了一层煤灰。
- 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。
- A block of compressed coal dust, charcoal, or sawdust and wood chips, used for fuel and kindling. 煤砖，炭砖把煤灰，木炭或锯木灰和木片压缩制成的砖块状物，用作燃料和点火
- 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。
- He became ill after breathing in a lot of coal dust. 他吸入大量的煤灰之后病了。
- The modern city consists of monstrous edifices and of dark narrow streets full of petrol fumes, coal dust, and toxic gases. 现代城市是由大得怕人的大厦和充斥着难闻的汽油味，煤灰和有毒气体和又阴暗又狭窄的街道所组成。
- 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 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. 煤炭工人的煤尘肺是由吸入煤矿粉尘引起。
- He carried out trial runs using rockets stuffed with coal dust. 他用填满煤粉的火箭式烟火装置来进行试验。
- The formula of accumulated charges in the dust layer indicated that the charge quantity was proportional to the discharge time constant. 推导了极板沉积粉尘层积累电荷量公式,表明电荷量多少与粉尘层放电时间常数成正比。
- Waste from anthracite coal mines,consisting of fine coal,coal dust,and dirt. 无烟煤废渣无烟煤煤矿的废弃物，由细粒无烟煤、煤尘和尘土构成
- Some part of vapor would condense dew and attach to the inner wall of the tube,and dust parse to dew in turn,which is the forming causes of the dust layer with high strength. 露水又粘结尘灰,形成一层粘结强度很好的尘垢层,影响抽尘热风流正常流动,也影响风管的使用寿命。
- It is necessary to determine charged dust layer thickness at back corona breakdown point in electrostatic precipitation in order to select rapping periodicity reasonably. 为了合理地确定静电除尘器清灰振打周期,通过理论与试验方法确定静电除尘器粉尘层反电晕击穿厚度很有必要的。
- Waste from anthracite coal mines, consisting of fine coal, coal dust, and dirt. 无烟煤废渣无烟煤煤矿的废弃物，由细粒无烟煤、煤尘和尘土构成
- He moved the coal cakes away, and there was only coal dust left on the floor. 他把煤饼搬走了，地下只剩下一层煤末。
- It took me a whole afternoon to make this coal dust into coal cakes. 我用了一下午的时间把煤末做成了这些煤饼。
- Under the operating mode, the charged particles can cause the electric field change in ESP, such as ion electric current weakening, original electric field distorting and voltage of dust layer influence particle charging, etc. 针对烟气中荷电颗粒的电场特性及收尘极板粉尘层的反向场强对电除尘器电晕电场的影响,建立了颗粒群空间荷电模型,提出了荷电衰减系数的概念。
- A block of compressed coal dust,charcoal,or sawdust and wood chips,used for fuel and kindling. 煤砖，炭砖把煤灰，木炭或锯木灰和木片压缩制成的砖块状物，用作燃料和点火
