The application of new technologies solves the problem of dust contamination, 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。

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A considerable portion of electric contact failure is caused by environmental factors, of which dust contamination 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。

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Sanitary conditions are controllable within a dehydration pant, whereas in open fields contamination from dust, insects. birds and rodents are major problems.

脱水工厂内部的卫生条件是可以控制的，而在旷野上，受灰尘、昆虫、鸟类和齿动物污染是主要问题。

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Workers in blue uniforms and blue hairnets were moving in swift precision around long temperature-controlled assembly lines, sealed off from dust and contamination by glass walls.

NEWYORKER: Green Giant