| 摘要 |
A pipe (1) intended to serve as soil sewage pipe, other waste pipe or cable conduit and made of plastic material is provided with outwardly directed bulgings (2) and intermediate cylindric pipe portions (3), the axial length of both the bulgings (2) and intermediate pipe portions being preferably about 0.5 times the inner diameter (Dri) of the pipe and the inner diameter (Dri) of the outwardly directed bulgings preferably being 1.14 times the inner diameter of the pipe, and the wall thickness of the pipe being about 0.02 times the pipe inner diameter (Dri).
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