The most common method is clipper and spiral seam. It can connect the filter fabrics and filter screens effectively into ring, long life time, no wrinkles.
最常用的是钢扣连接,螺旋连接,能有效将滤布、滤网连成环形,并且使用寿命长,滤布不打皱。
3
This filter USES several parallel-coupling ring resonators and direct-coupling structure between feed lines and rings.