烟尘

The carriage left a trail of dust.

马车后扬起了一缕。

There is smut on the windows.

窗户上有。

The process treating roast dust from zinc pyrometallurgy is,in general,the second roasting by rotary kiln.

处理火法炼锌高温流态化焙烧过程所产的,用回转窑二次焙烧流程。

It's annoying that the chimneys of those plants in the city eject a lot of smoke every day.

"城里工厂的囱每天都吐出大量的,很是讨厌。"

What are put down by us are not only bricks, stones, steel, concrete and limbers, but culture as well.

除了文化，就是这些文化的载体，也在推机的中消散殆尽了。

The harnessing of noise and smust to boiler are studied,pugging and ventilation are adopted to harnest noise of fan.

通过煤矿锅炉噪声治理和治理的研究,阐述了通过用隔声罩和机械通风冷却设风机和鼓风机的降噪治理。

In this paper,the practice of producing nanometer zincite and concentrating indium from the dust of smelting lead was introduced in detail.

文章详细介绍了利用铅冶炼生产纳米氧化锌并富集铟的生产实践。

It is brought forward a technique craftwork of dust remove of acetylith soot by analysis of acetylith soot . It takes a good effect .

本文电石的特征进行分析,提出了电石炉气除的工艺方案,经实践取得较好的效果。