| 摘要 |
In an annularly corrugated flexible plastic protective tube or conduit for receiving lines the longitudinal slit thereof is so widened that it is readily possible to insert the lines without interference. Clamped in fitting manner on the tube is an outer tube which also has a wide longitudinal slot and which covers the longitudinal slot of the first tube. The locking engagement of inner and outer tubes can be improved by corresponding complementary formation of the ribs or corrugations of the tubes. Branch pieces can be clamped onto the inner and outer tubes.
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