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STARD has passed ISO9001 quality certification, the United States API - 6 d the authentication, European CE certification, AZ security authentication and so on more than forty ZhangHangYe certificate. The company's products in addition to have a place in the domestic outside, but also have been exported to Europe, America, Canada, and the Middle East and east Asia and other countries, and received good reputation, welcome new and old friends to come to consult the purchase!