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YD-850 High Density Calcium Silicate Machined Components for Molten Aluminum Degassing Rotor Protective Sleeves, Find Details and Price about Insulation Material Insulation Board from YD-850 High Density Calcium Silicate Machined Components for Molten Aluminum Degassing Rotor Protective Sleeves - Laizhou Yongda High Temp. Material Co., Ltd.