§Rock transportation requires a significant amount of
energy and big size equipment.
<!--[if ppt]-->§§This operation is dangerous. We have to understand how we can conduct this operation in a safe manner.
<!--[if ppt]-->§§It is possible to optimize this process and to reduce the operating costs.
hassan
نشرت فى 24 نوفمبر 2018
بواسطة hasan
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