Obtain

Recently, the product--Car Arrester, which developed independently by China Coal Group passed the audit of the State Intellectual Property Office and obtained the Certificate of Utility Model Patent(C

Recently, the product--No Pressure Air Door, which developed independently by China Coal Group passed the audit of the State Intellectual Property Office and obtained the Certificate of Utility Model

Recently, the product--sliding stop buffer, which developed independently by China Coal Group passed the audit of the State Intellectual Property Office and obtained the Certificate of Utility Model P