lowgrade 中文意思是什麼
lowgrade
解釋
低級的-
The result is that the probability of high tensity rockburst in the tunnel is non - existent and the probability of lowgrade and moderate tensity rockburst in the tunnel is existent
預測結果表明，雪峰山隧道不會出現高烈度的巖爆，但某些地段可以出現級或級的巖爆。
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