1.
Where, following an abnormal condition, the removal of dust accumulations or layers cannot be assured, then the area is to be classified zone21.
如果不能保证排除可燃性粉尘堆积或粉尘层时，则应划分为21区。
2.
Determination of the minimum ignition temperature of dust layer
GB/T16430-1996粉尘层最低着火温度的测定方法
3.
The seam water injection is an effective measure to control coal dust concentration.
煤层注水是降低矿井粉尘浓度的有效措施之一。
4.
The Primary Study of Dust Microparticles in the upper Ningjingangsang Ice Core
宁金刚桑地区冰芯中浅层粉尘的初步研究
5.
A cloud of fine, dry particles.
粉尘尘雾状细干颗粒
6.
Through a cloud of dust, as l move nearer, I can make out three men working with these chemicals.
我走近了粉末部，透过一层云雾般的粉尘，我辨认出有三个人正在制作这些化学品。
7.
methods of measuring dust concentration in flue gas
废气中粉尘浓度分析法
8.
crumble to [ into ] dust
碎成粉末, 化为尘土
9.
The amount of the industrial dust is 9.9006 million tons.
工业粉尘排放量990.6万吨。
10.
Atmospheric air-Test dust standard sample-Fly ash
GB/T13269-1991大气试验粉尘标准样品煤飞尘
11.
Atmospheric air-Test dust standard sample-Loess dust
GB/T13268-1991大气试验粉尘标准样品黄土尘
12.
Directives for dust explosion protection for dust collectors in dust explosion hadardous ares
粉尘爆炸危险场所用收尘器 防爆导则
13.
The Analysis of Mechanical Behaviors of Dust Particle in ESP
电除尘器中粉尘粒子的力学行为分析
14.
Dust-collecting devices adopted, absorbing dust, preventing air pollution.
配置集尘装置，吸收粉尘，防止空气污染。
15.
The Study of Suppressing Thick Road Dust in Tong Lu Shan Mine;
铜录山矿运输道路粉尘抑尘控制研究
16.
The Test Research of Electrostatic Precipitator Collecting Dust When Using Worse Coal;
电除尘器收集困难煤种粉尘试验研究
17.
Development and application of the new-type retrievable dust collector
新型粉尘回收式除尘器的研制与应用
18.
Research progress on the groupⅠallergen of house dust mite
屋尘螨和粉尘螨Ⅰ类变应原研究进展