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what is internal or hole grinding operation mining equipment values cost

what is internal or hole grinding operation mining equipment values cost

by F AHAMAD 2010 Cited by 1 — 2.5.2.2 Internal rate of return requirements for the award of Bachelor of Technology degree in Mining Engineering at In the developed world, the value of mining is increasingly Drilling costs vary with hole depth, rock conditions, number of holes and The analysis of unit operating-costs shows that for similar ore body 

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    The biggest factor affecting total cost of operation is the number of internal features per part. Figure 1shows the total cost of operation for identical nests: one producing the external geometry and internal holes and the other producing just the external geometry. This process proves to be a relatively expensive way to produce the internal

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