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алт олборлох гар машин алт олборлох бариул. English for Mining Engineers 2012 Шингэнээр олборлох ил арга Алт Золото 3 Zinc The nature of the geotechnical environment and the resultant geomechanics i e how the ground responds during excavation is one of the primary influences on miningfor example ...алт олборлох ...
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