| 摘要 |
For use in internally supporting a filter element of the fabric, bag-shape type there is provided a support frame having a border at least a part of which is defined by a single guide strip (60) typically substantially W-shaped in cross-section and which presents two guide channels (61,62) to face inwards of the frame for the spaced apart support of two mesh layers (18). A single deformed length of the guide strip (60) may be used to form a base and two side portions of a rectangular shaped support frame. |
