The application of new technologies solves the problem of dustcontamination, increases the purity of molten iron and improves the automatic control to the furnace.
新技术的应用有效地改善了粉尘污染问题，提高了铁水的纯净度，提高了设备自动化控制水平。
2
A considerable portion of electric contact failure is caused by environmental factors, of which dustcontamination is an important factor on electric contact reliability.
在电接触故障中，由环境因素导致的占了很大一部分，其中尘土污染是影响电接触可靠性的一个重要因素。
3
Sanitary conditions are controllable within a dehydration pant, whereas in open fields contamination from dust, insects. birds and rodents are major problems.