التعدين منطقة المصنف
بوتسوانا الرمال التعدين. Department of Mines halts sand mining | TheVoiceBWDec 16, 2016 . The department of Mines has stopped issuing sand mining licences in the Southern region, because rivers in the area have degraded and availability of . the Botswana Geoscience Institute, encouraged construction companies and the small scale builders to start making use of manufactured ...