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CISBOT
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<p>CISBOT (cast-iron sealing robot) is a <a href="/facts/Cast_iron_pipe/dLaYHYmr">cast iron pipe</a>-repair robot that seals the joints in <a href="/facts/Natural_gas/9MYQ7NAP">natural gas</a> pipelines from the inside, thus extending their use for up to fifty years without unearthing the joints. </p>