File:German tunnel curves.jpg
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![File:German tunnel curves.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/d/d6/German_tunnel_curves.jpg/800px-German_tunnel_curves.jpg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 06:05, 24 March 2008 | ![]() | 976 × 518 (62 KB) | wikimediacommons>Achim Hering | {{Information |Description=Time/Temperature Curve used for testing the [http://en.wikipedia.org/wiki/Fire-resistance_rating fire-resistance rating] of [http://en.wikipedia.org/wiki/Passive_fire_protection passive fire protection] systems in tunnels in |
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