3 results for ""Grahame Tharp"".
Demonstrates how fires are caused on mine conveyor belts, how correct pit maintenance can prevent many…
Describes the causes and prevention of fires on mine conveyor belts. Covers preventive measures, including fire…
…J. Wrightson, and June Howard Directed by: Grahame Tharp Photographed by: Sidney Beadle Sound Recorded by…