1·The presence of exogenous surface contamination, including dirt, grease, free iron from contact with steel tooling, and so forth, may interfere with the formation of the passive film.
外生的表面污染,包括:尘土、油脂、来自钢铁加工的游离铁等等,可以影响到钝化膜的生成。
2·The unique advantages are: no contamination, high efficiency, free from power, less weight, easy for cleaning and maintenance and wide range of application.
具有:无脱落污染、效率高、不需电能消耗、重量轻、容易清洗、便于维修、应用范围广泛等特点。
3·The invention relates to many articles, particularly those public use materials for easy contamination, free from scribbling, without prevention of the sticky paper.
现有的很多物体,尤其是公共使用的物体,表面易粘污、不防涂画、不防粘贴 纸张。