Qingdao GD Machinery Co., Ltd. is specialized in making hydraulic parts, was founded in 1996 and is one of the most important manufacturers and trader of Oil hydraulic products.. We manufacture: - Hydraulic Cylinders - Hydraulic Power Units - Hydraulic Flanges - Hydraulic Manifolds-blocks - Hydraulic Fittings - hydraulic Accessories Over fifteen years of success in a highly competitive environment, certification of quality management ISO 9001.We offer high quality and good price products. If you are looking for excellence in Hydraulic, please contact us.