我厂的煤气初冷器因管壁上结积杂质而影响其冷却作用。
Impurities gathered in the duct wall affected the cooling effect of coal gas primary cooler.
在浮栅的两侧壁上，设置侧壁绝缘膜。第一杂质扩散层设置在半导体基板内，并与浮栅仅离规定的距离。
A first impurity diffusion layer, which occupies a space within the semiconductor substrate, is provided separately apart from the floating gate by a predetermined distance.
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