| 摘要 |
A plumbing device for plugging a pipe includes a radially expansible rubber sleeve disposed about one end of an axial shaft or tube. An annular flange is provided on the end of the shaft while an elongated metal cylinder is disposed coaxially about the shaft on the opposite side of the sleeve to transmit axial compressive movement to the rubber sleeve from a screw jack mechanism releasably secured on the shaft in proximity to its other end.
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