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Welcome here ! bellsdo tech co.ltd founded in 2001 year, it's a world-leading vacuum tubes and igbt modules wholesale stock affiliated in shenzhen . here we supply all kinds of igbt modules and preamp, power, rectifier vacuum tubes with reasonable price to customers all around the world. in our shop you could get universal economical modules and vacuum tubes . we insist on high-quality, high efficiency and credibility, which aims to establish a long-term economic trade relation with a vast number of clients. regarding electron tubes, we specialized in offering all the items belongs to the following brands : electro harmonix, sovtek, svetlana,tung-sol,mullard,gold lion,jj, shuguang ,psvane,philips, western electric ect . in the meantime , modules are available in infineon,mitsubishi,semikron,fuji,ixys,toshiba,sanrex vishay ect ... with all sincerity, we hope we can build mutual benefits to cooperational partners base of your support and create a bright future together .