| 摘要 |
A device and process for vertically extracting diffusers from a wastewater treatment tank where the diffusers are attached to a device having a lifting point and a pivot extraction point. The device and diffusers are lifted from the bottom of the tank until there is a clearance between the diffusers and the bottom of the tank, and then a pulling member attached to the pivot extraction point is pulled to pivot the device and the diffusers to align the diffusers with the hole. The diffusers and the device can then be extracted vertically through the hole.
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