Indicator Calculator, Downwind Toxic Vapor Hazard Line Source, 2 pack

Indicator Calculator, Downwind Toxic Vapor Hazard Line Source, 2 pack

Indicator Calculator, Downwind Toxic Vapor Hazard Line Source, 2 pack

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This slide rule device has imprinted scales designed to facilitate rapid calculation of the hazard at various distances downwind from toxic vapors released from a point or line source. Picture shows both sides of device. You get two calculators for $14.95. Unused.
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