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Dyfyniad Arddull ChicagoSafety, American Institute of Chemical Engineers. Center for Chemical Process. Guidelines for Safe Handling of Powders and Bulk Solids. New York : Wiley, 2004.
Dyfyniad MLASafety, American Institute of Chemical Engineers. Center for Chemical Process. Guidelines for Safe Handling of Powders and Bulk Solids. New York : Wiley, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.