Singumvelisi oqeqeshiweyo wofakelo lwemibhobho yentsimbi eMalleable e-China, ngaphezulu kweminyaka engama-30 kweli candelo.Impahla kumazwe amaninzi, ezifana, United Kingdom, Poland, Russia, Australia, Malaysia, Indonesia, Saudi Arabia njl.
Funda ngokugqithisileyo