| 摘要 |
An assembly internally seals a manhole against infiltration of water. A pleated sleeve, made of an resilient material, includes a first and second sealing sections at opposite ends. The first sealing section has a lip that forms a recess for receiving an inwardly projecting flange on a frame of the manhole to attach the sleeve in a watertight manner. A fastening device engages the second sealing section and presses an outer surface of the sleeve against a different portion of the manhole to form another watertight seal.
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