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  • Harper Jimenez——Studied at the University of Zurich, Lives in Zurich, Switzerland.

    The United States, Canada and Mexico have some of the largest reserves of high-quality gypsum. Gypsum is mined in 17 states. ... Natural gypsum and FGD gypsum have the same chemical composition, they are calcium sulfate dihydrate (CaSO4.read more >>
    +119962023-05-28 09:51:20

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