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Production. Zinc. The operator of a zinc ore leader at a large smelting plant is protected against harmful dust by a mask.…
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Production. Zinc. The operator of a zinc ore leader at a large smelting plant is protected against harmful dust by a mask. From the Eagle-Picher plant near Cardin, Oklahoma, come great quantities of zinc and lead to serve many important purposes in the war effort. Sourced from the Library of Congress.

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Production. Zinc. The operator of a zinc ore leader at a large smelting plant is protected against harmful dust by a mask. From the Eagle-Picher plant near Cardin, Oklahoma, come great quantities of zinc and lead to serve many important purposes in the war effort. Sourced from the Library of Congress.

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