DUOLENG NEW MATERIAL CO., LTD. Specialize in Bearing angular steel grit and alloy steel shot . Our patented product - alloy angular steel grit is recognized as high-tech product by Torch High-Tech development center of Science and Technology department. It widely used in China CNPC pipeline coating & around 35 Chinese Shipyards. Due to we adopted the environmentally friendly production system, the Chinese custom provide the preferential tariff of 0% to our company only , while other grit company still have 25% tariff. So the best quality and the preferential tariff of our company are our strong advantages.
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