| 摘要 |
The filter (15) has a high density layer (18) arranged at an upstream side in a gas flow direction, where the filter is formed by an aggregate of crimped fibers (16) and straight fibers (17) made of polyethylenterephthalate. The crimped fibers are configured in a fiber form for collecting oil or water. A low density layer (19) is arranged at a downstream side and formed by the straight fibers configured in a fiber form for draining the collected oil or water. The low density layer is laminated with the high density layer. |
