 Open Pit and Underground Mining of Coal price for sale in Tanzania As a principle , a na-ewere usoro nkwụsị nke ọma ka ọ bụrụ ihe a na-enwerịrị ike ịnweta ma na-achịkwa karịa Ala, karịsịa na mgbake, ikike mmepụta, nchịkọta akara na ibelata ọkwa, nkwụsị na mbido, mgbanwe, nchekwa, na ihe ndị ọzọ. 