| 摘要 |
In order likewise to make the gap which frequently forms between a cable core (10) and the sheath (not shown here) surrounding it longitudinally waterproof, a substance which can expand and is in the form of an expanding fleece is arranged around the core. The quantity of the relatively expensive expanding fleece is kept low by fitting it to the core only in the form of strips, in the form of two crossed-over helixes (13, 14), so that the parts of the core which are not covered are divided into chambers (15) which are separated from one another such that they are impermeable to fluid. <IMAGE>
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