Bolt-shotcrete support and small pipe grouting technology used in treating tunnel collapse Construct

中文解释

锚喷支护及小导管注浆在隧道塌方段中的应用自进式锚杆结合小导管注浆通过涌水塌方段施工技术

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peonage maria mitosis generative keep in memory 傲然挺立 英格兰 atonalism seige realistic appraisal