| 摘要 |
Sheet of filter material folded into a zig-zag to make a filter body is boxed in along the sides and sealed to a flange at one end. The liquid to be filtered passes through the opening in the flange and flows to the other end of the body or vice versa, leaving the filter material may be paper with bosses which separate adjacent faces after folding, and the edges may be foled in to make them thicker. |
