Real density, hardness toughness and grinding performances were tested.

对磨料的密度、硬度、韧性及磨削性能进行了测定。

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The results show that the higher graphitization degree of pitch derived carbon is, the higher real density is.

沥青炭的室温电阻率随石墨化度的增加而下降，随体积密度的增大而下降；

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The real density of needle coke strongly influences the bulk density of graphite electrodes: a coke of high real density tends to yield low density rods.

针状焦的真密度强烈地影响着石墨电极的体积密度：真密度高的焦炭往往产生低密度的电极。

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Yet strict density limits are preventing real estate developers from meeting the market demand for more housing and office space.

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If a source has low power density, then it will likely require too much real estate, material or space to provide the power that we demand at prices we can afford or in the vast quantities that the world needs.

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