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People who like reply on If the safety of your systems and tunnels are 'certified` by German firm TÜV SÜD, Read This!!!
Abbas Shakir on If the safety of your systems and tunnels are 'certified` by German firm TÜV SÜD, Read This!!! (): Inspection firm overlooked flaws in Brazilian dam that collapsed, stonewall...
cover tunnel photo by: Matt Brown from London, England / CC BY
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