... solids-delivery valve 固料输送阀 solids expansion 固相膨胀 solids feeder 固体加料器 ...
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expansion of solids 固体膨胀
As a general rule, solids can expand and contract too. But the coefficients of expansion and contraction of solids are on the whole smaller than those of liquids.
和固体、液体相区别的一种状态：相对低的密度和粘性，在相对高的 扩张和压缩性。
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