有人总把过滤器的效率等级与洁净室的级别对应起来，好像用了多少个9的超高效过滤器就能达到百级甚至10级的洁净度。
Someone always put the efficiency level of the filter with the actual level of clean room, if use how many 9 super efficient filter can reach the best level or even 10 level of cleanliness.
型过滤器主要用于大风量通风系统，如：发电厂及其它要求大风量的通风设施，还应用于末级过滤器及超高效过滤器的前端预过滤器。
V-Bank HEPA filters are designed for use in high-volume airflow facilities, e. g., final stage filters for power plants. They are also used as secondary filters for facilities with ULPA requirements.
超高效空气过滤器，进口超细玻璃纤维滤纸；
Ultra-efficient air filters(ULPA), ultra-fine glass fiber filter paper imports;
超高效空气过滤器，进口超细玻璃纤维滤纸；
Ultra-efficient air filters(ULPA), ultra-fine glass fiber filter paper imports;
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