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The company is located in nanxiang town, jiading district, Shanghai antimony products co., LTD. The company Chang Dechen states \"Calvin states card\" antimony trioxide in east China, north China sales agency. The environmental protection level quality product has won the broad masses of customers at home and abroad for many years - recognition, enjoys a very high market reputation. Company's main products: \"Chen\" state \"brand antimony trioxide, wet antimony trioxide, antimony trioxide in nanometer scale.