... 钙质板岩calc slate 碳质板岩carbonaceous slate 凝灰质板岩tuffaceous slate ...
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...中国论文网 关键词：隧道；炭质板岩；非线性蠕变模型；含水损伤；围岩稳定性 [gap=1569]Key words:tunnels; carbonaceous slate; nonlinear creep model; water damage; stability of surrounding rock ..
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