尺寸精确，平整度好；
路面平整度是评价路面使用性能最主要的一项指标。
The road roughness is an important index evaluating pavement performance.
性能：表面耐磨，机械强度高，平整度高，密度均匀。
Property: scratches resistance, high mechanical, good flatness uniform density.
性能：表面耐磨，机械强度高，平整度高，密度均匀。
Property: scratches resistance, high mechanical, good flatness uniform density.
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