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Hi All, <br />I once saw a railfan video that showed the construction of a new siding at the Detroit Edison coal-fired power plant south of Detroit. After the rails were laid, a crew was going along welding the joints. What was different, was that they were using a device that had a hopper full of something that was ignited. As it burned, whatever was in the hopper melted and flowed in to some sort of form clamoed to the rails. Can anyone explain what this technique is and how it works? <br /> <br />Thanks, <br />Admiral
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