Umthengisi waseTshayina wekhabhoni yentsimbi yeekhemikhali ze-ankile iibholithi zobungakanani besiko
Umthengisi waseTshayina wekhabhoni yentsimbi yeekhemikhali ze-ankile iibholithi zobungakanani besiko
Bhala umyalezo wakho apha kwaye uwuthumele kuthi