| 摘要 |
In a heat sealed pipe connection for pipe parts of a synthetic thermoplastic material comprising at least one female pipe part(1) and a male pipe part(2), the female pipe part had adjacent its ends annular centering abutment projection(9) on its outside surface. The abutment surfaces of the centering projections were substantially perpendicular to the longitudinal axis of the female pipe part and each centering projection constituted a continuous abutment surface to facilitate gripping of the female pipe part to align the male and female pipe parts.
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