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If density is constant, we might as well take it to be one.
如果密度是不变的，就可以取之为。
youdao
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The effect of apparent density on the critical feed height is given as well.
同时指出了松装密度对临界堆料高度的影响。
youdao
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The effect of apparent density on the critical feed height is given as well.
同时指出了松装密度对临界堆料高度的影响。
youdao