RDER International Investment Trade Co., Ltd. Is an export, import-oriented set of product design, production, sales and service in one integrated enterprise. Company based in Shandong, China, relying on logistics and port - Qingdao, easier to export and import. The company products; wet curtain paper, wet curtain wall cooling system, cooling fan, animal fan, flowers, fans, circulation fans, no power roof ventilators, loudspeaker rope duct, plumbing radiators, coal-fired heater, plumbing