欧美超大胆裸体XX视频

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          Welcome to the official website of Changshu Xinhua Chemical Co., Ltd.!

          Changshu Xinhua chemical co., ltd.

          常熟市新華化工有限公司

          Changshu Xinhua chemical co., ltd.

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          · Have a scientific enterprise management system · Is a high-tech enterprise in Jiangsu Province and Changshu Polymer New Material Industry Base

          Magnesium Fluoride

          Molecular formula: MgF2
          Molecualr weight: 62.31
          Properties: Colorless crystal of tetragonal system or powder; soluble in nitric acid, slightly in dilute acid and hardly in water and alcohol.
          Usage: in manufacture of ceramics, glass and flux in smelting Magnesium and Aluminium, mirror in optical instruments and coating of filter and soldering.
          Content: ≥98% (measured against igniting under high temperature)
          Impurities:

          Na

          ≤0.3%

          Ca

          ≤0.7%

          SiO2

          ≤1.0%

          SO4

          ≤0.2%

          H2O

          ≤2%

          Fe

          ≤0.05%

          Pb

          ≤0.02%

          Packing: 25kg plastic woven bag
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          欧美超大胆裸体XX视频

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