4N Polycrystalline Silicon4N Polycrystalline Silicon: Appearance:Grey metal with metallic luster. Purity:4N Application:Polycrystalline silicon is the direct material to prod
5N High Resistance Polycrystalline SiliconAppearance:grey metal with metallic luster. Purity:5N ,Si≥99.999 Size: 2cm-10cm Resistivity:0.5-3.0&Omega
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