Lightning protection guide by OBO

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Last revision 2020

Strana 271 z 288

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2 276 Internal lightning protection system Chapter Testing, maintenance and documentation TBS Blitzschutz-Leitfaden 2018 / en / 2020/01/10 14:42:40 14:42:40 (LLExport_02613) / 2020/01/10 14:42:54 14:42:54 271 Chapter Testing, maintenance and documentation .1 273 External lightning protection system 4.272 Testing, maintenance and documentation 4

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