| 摘要 |
A gas filter comprises orthogonally disposed sets of parallel support members (11, 12) retained by an external frame (10). The support members of each set are slotted (14) for inter-engagement of the members of the other set so that the support structure can be collapsed for transport. Sheet filter medium is draped over members (11, 12) in a flat, corrugated form. <IMAGE> |
