The results show that the ceramic coating is composed of a two-layer structure with the surface loose zone and the inner compact zone.
结果表明，陶瓷膜具有内部致密层和外部疏松层两层结构，膜层与铝基体为冶金结合。
Testing and judgment of surrounding rock loose zone of tunnel engineering is very important for construction supporting design in the tunnel construction period.
隧道工程施工期围岩松动圈的测试与判定，对于施工支护设计具有重要作用。
Testing and judgment of surrounding rock loose zone of tunnel engineering is very important for construction supporting design in the tunnel construction period.
隧道工程施工期围岩松动圈的测试与判定，对于施工支护设计具有重要作用。
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