Workers Ignite Cad-Weld Powder in a Crucible

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Workers Ignite Cad-Weld Powder in a Crucible

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Workers ignite cad-Weld powder in a crucible.

For more information about cad-welding (i.e. exothermic welding), read en.wikipedia.org/wiki/Exothermic_welding.

View more photos of railroad workers replacing a Muni lightrail track section on Church street in San Francisco.

Date & GPS location
Photo taken on January 29, 2012
190 Church St, San Francisco, CA 94114, USA
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