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熱門關鍵詞:鐵礦 錳礦 勘探設備 破碎機 磁選機 礦山 采礦設備 鉻礦 |
凍土地區工程地質調查規程(三) | |
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S≤1.5 |
凍脹量應通過實測確定,巖性為沼澤土、淤泥質粘性土 |
注:①凍脹率n為凍土體凍結后高度h1與凍土體凍結前高度h之差和凍土體凍結前高度比的百分數即:
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