Aluminum Oxide Specific gravity 2.4 Moh hardness 3. More a filler than an abrasive. Tends to fade, but has good wear resistance. Will polish the opposing surface.

氢氧化铝比重2.4莫氏硬度3。比磨料加得更多的填充物。有衰退趋势，但耐磨性好。将抛光对偶。

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The results show that the specific surface resistance of the PET film decreases regularly with increasing implanting dose and growing temperature.

结果表明，随离子注入的种类不同、剂量的变化、温度的升降，PET膜的表面电阻率呈规律性变化。

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Thus obtained was a high performance getter strip with high specific surface area, high resistance of thermal shock and good endurance of mechanical vibration.

所得带材是一种具有高比表面，高抗热震性和耐机械振动的高性能吸气材料。

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