介绍了扇形滤纸的一种新的折叠方法，并与常用的折叠方法进行了比较。
Whereas this method is compared with the usual method-folded of segmental filter paper?s.
本实用新型涉及一种空气过滤器滤芯，由壳体、中心轴和折叠式滤纸组成。
The utility model relates to a filter-element of air-filter comprising casing, central shaft and folding filter-paper.
本实用新型涉及一种空气过滤器滤芯，由壳体、中心轴和折叠式滤纸组成。
The utility model relates to a filter-element of air-filter comprising casing, central shaft and folding filter-paper.
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