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неупорная руда (Non-refractory ore is where cyanide can be used to extract the gold. This is desirable as it means the process will be cheaper.  weebly.com Alexander Demidov) | |||
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| неупорная руда (Non-refractory ore is where cyanide can be used to extract the gold. This is desirable as it means the process will be cheaper. weebly.com Alexander Demidov) | |||
