shenzhen jeff industrial group co., ltd.'s main products include the processing and sales of non-ferrous metals such as tungsten, antimony, rare earths and other non-ferrous metals in mining investment and development projects. the brand "jeff brand" antimony ingot, antimony oxide, antimony trioxide, antimony ingot raw materials, sedratum sand, gallium, black tungsten concentrate, flame retardant, flame retardant masterbatch, etc., as well as real estate development, venture capital, financial investment and other projects
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