For the material studied, the angularity of pebble is the smallest, while the angularity difference between limestone, granite, basalt and andesite are not obvious.
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释义
对于所采用的材料,卵石的棱角性最差,石灰岩、花岗岩、玄武岩与安山岩4个集料的棱角性差异并不显著。
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