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Artisanal-and-small-scale-mining (ASM) copper concentrate offtake book from the DRC: per-shipment aggregation and traceability records, assay protocol results (grade, impurity and arsenic content), blending decisions, and onward delivery terms to Asian smelters — plus the commercial structure of a multi-year offtake (volumes, pricing basis, formalisation and compliance status of supplying mining sites)
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