| 摘要 |
A collecting line for leakage monitoring in an installation is permeable to a substance (S) to be monitored in at least one section extending along t he longitudinal direction. The collecting line consists of at least two subs ections (10, 14) that are interspaced from a first end (12) of the collectin g line. The distance (a2) of the second subsection (14) is larger than that of the first subsection (10). The invention is characterized in that the per meability to the substance (S) to be monitored is higher in the first subsec tion (10) than in the second subsection (14).
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