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A professional company engaged in the sales, leasing, maintenance, and metrology of instruments and meters. It primarily focuses on the sales and leasing of second-hand high-frequency communication testing instruments and equipment, including world-renowned brands such as Agilent, HP, Anritsu, Advantest, R/S, IFR/MARCONI, and Yangguang, covering network analyzers, spectrum analyzers, comprehensive testers, digital communication testers, high-frequency signal sources, high-frequency oscilloscopes, signal generators, audio analyzers, power supplies, and more.