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4N级铜锭：适用于尖端工业领域的高纯度铜材
2025-09-23
4N铜锭指纯度达99.99%（4N级）的铜，通过先进的精炼和铸造工艺生产而成。
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The company always adheres to the “service to customers” as the center.
2025-06-25
The company always adheres to the “service to customers” as the center.
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Get to know us, choose us
2025-06-25
Business Metallurgy（Qing dao）Co., Ltd . is a state-owned enterprise specializing in the integrated operation of non-ferrous metals, combining industrial production, mining, international trade, overseas warehousing, and logistics.
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Avril
Fannie
Chtherine
