Sperry - George Dodd, Field Service Manager for Sperry International, with the company’s Walking Stick (jpg)

Sperry - George Dodd, Field Service Manager for Sperry International, with the company’s Walking Stick

George Dodd, Field Service Manager for Sperry International, with the company’s Walking Stick. It uses nine transducers to project sound into the rail to detect anomalies caused by cracks

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