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PCE
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CPC Subgroup
E21C 41/26

Methods of surface mining (machines for obtaining, or the removal of, materials in open-pit mines E21C47/00); Layouts therefor

Full Title

Methods of underground or surface mining (E21C45/00 takes precedence); Layouts therefor (for peat E21C49/00) > Methods of surface mining (machines for obtaining, or the removal of, materials in open-pit mines E21C47/00); Layouts therefor

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