By the charge density we mean the per unit volume.
所谓的电荷密度是指单位体积的电荷。
Product exterior level off, smooth, high volume density, good thermal conductivity, excellent energy saving effect.
制品外观平整、光滑、体积密度高，具有良好的导热性，节能效果优异。
Light weight, higher energy density, small volume.
轻便，高能量，体积小。
Light weight, higher energy density, small volume.
轻便，高能量，体积小。
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