Therefore, if a resistor acquires surface films from careless handling or deposits from aircontaminants, it should be cleaned with a foam-tipped swab and methanol.
所以，如果由于不当的处理或空气污染物的沉积而在其表面形成薄膜，则应使用浸了甲醇的泡沫签来清洗。
2
This paper reviews the influence of aircontaminants, i. e., impurities in air stream of cathode, on the performance of proton exchange membrane of fuel cells (PEMFC).
论述了城市空气污染物(即阴极气体杂质)对质子交换膜燃料电池(PEMFC)性能的影响。
3
In this paper, the category and harm of indoor aircontaminants are described, the theories and advantages and disadvantages of several purification technics are introduced.