pcb pcba supply chain contract manufacturing supply chain management u.s. department of commerce bureau of industry oem otm uganda optimum design conflict mineral tin columbite-tantalite democratic republic of congo tungsten rwanda tantalum 3ts gold woframite dodd-frank ems electronics manufacturing services south sudan hidden cost direct cost aerospace counterfeit components risk mitigation product development part sourcing military sourcing process counterfeit avoidance inventory control pcba management traceability production cost geopolitical risk crossing borders cost savings domestic approach cost elimination china import restrictions inventory pipeline supplier selection printed circuit board manufacturing warehousing offshoring contract management outsourcing cost
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