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Germanium Granule Ge Granule Germanium Metal for Mental Coating

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Germanium Granules Sizes 3-7 mm Chemical Purity 5n 99.999% Ge Granule

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Germanium Ge Granule for High Heating Optical Evaporation Vacuum Coating

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High Purity 99.999% 8*50mm Metal Germanium Single Crystal