Natural rubber in this study includes information on all grades, milled and unmilled. It is a naturally-occurring polyisoprene elastomer recovered from the sap of rubber trees and certain other trees and plants. Natural rubber is generally noted for its excellent flexibility and resiliency, but exhibits poor resistance to solvent and oxidative attack. The majority of the world's natural rubber comes from Asia and some from Africa and is generally supplied in solid form or as alkali-stabilized latex
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Cameroon [CM] 
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