The mining activities at the deeper levels in Kolar goldmines became uneconomic as early as the 1980s due to depletion in the high grade ore reserves . कोलर की स्वर्ण खदानों में गहराई में खनन का कार्य 1980 के दशक में ही उच्च स्तर के अयस्क भंड़ार में कमी के कारण फायदेमंद नहीं रह गया था .
How to say high grade ore in Hindi and what is the meaning of high grade ore in Hindi? high grade ore Hindi meaning, translation, pronunciation, synonyms and example sentences are provided by Hindlish.com.
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