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Breitenworbis, Germany. 28th Sep, 2019. Firefighters are standing in a simulated fire in the Höllberg tunnel on the A 38. In road tunnels, large-scale exercises have to be carried out every four
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Secret four-mile tunnel running 80 metres below London that has grotty but vital role - Mirror Online
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Four à tunnel cyclothermique MECATECK – FLEX – TC, matériel professionnel industrie agroalimentaire Vannes, France
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