Qingdao Dutelongdi Cast Iron Co., Ltd. adopts advanced Geman patent technology, specializing in the production of all kinds of gray iron, ductile iron, alloy cast iron sections: round, square, rectangular, regular polygon, semi circular profiles and symmetry, asymmetric cross-secion shaped profiles and plates. The company cultivates professional technical team, upholds the principle of strict product quality inspection system to ensure ex factory pass rate of 100%. The company is located in Qingdao with the convenience of sea, land and air transportation and international trade open city. Based on the spirit of customer first, honesty, users of the urgency of the principle, ensure the timely delivery to meet the urgent need of users at home and aboad.　　Our aim: Completely reducing cost for customers, improving the competiveness of the products to provide technical support and product services.