| 摘要 |
A sewer basket and its support are to be positioned at any selected level within a vertical sewer pipe having an interior surface and an opening , of reduced size or not, at street level. The basket support is secured to the interior surface of the sewer pipe to receive the basket that includes a plurality of filter units adjacently and releasably resting on the basket support. Each filter unit is so sized as to get through the sewer opening while being ins a substantially horizontal orientation. Each filter unit includes a frame, a filter screen secured to and closing the frame, and a handle device accessible from the pipe opening to properly position, place and retrieve the unit on and from the basket suppor t respectively. Preferably, an intermediate support having a generally flat lattice shape releasably rests on the basket support to itself support the filter units.
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