| 摘要 |
Method and apparatus for substantially reconstituting the internal diameter of sewer, water or drain line plastic pipes after being located in situ comprising a movable housing, sized preferably to at least 95 percent of the inside diameter of the pipe, and housing carried vibration means for causing such reconstitution of said pipe diameter substantially by virtue of vibration induced reallocation of the pipe encompassing earth or filler bed material.
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