... well-rejuvenating井的修复 well-rounded磨圆好的 well-shoot井下爆炸 ...
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沙丘砂由分选、磨圆好的石英砂组成,含量大于95%,具单众数粒度分布,无悬移质。
The dune sands are very well sorted and rounded pure quartz sand(>95%) with single mode grain distribution and without suspension materials.
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