"At low applied forces, the hardness of rhenium diboride is equivalent to cubic boron nitride, the second-hardest material known, Kaner said.
在低作,二硼化的硬度结构的氮化硼相等,而氮化硼是第二硬的材料。
"At low applied forces, the hardness of rhenium diboride is equivalent to cubic boron nitride, the second-hardest material known, Kaner said.
在低作,二硼化的硬度结构的氮化硼相等,而氮化硼是第二硬的材料。
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