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Metalor is a Swiss-based global independent company (part of the Tanaka Group) working in the precious metal fields that was created in 1852 with subsidiaries in 17 countries (in Europe, Americas and Asia) and more than 1500 employees; the company ha

Beijing Coupling Technology Co., Ltd. was established in 2006. It is a high-tech company with pharmaceutical chemistry and organic chemistry as its core technologies, integrating scientific research, production, and trade. It also provides research a