Thick medium coarse sand bed的意思|示意
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厚中粗砂层
Thick medium coarse sand bed的网络常见释义
厚中粗砂层 ...厚中粗砂层；中间钻头喷气；施工工艺；质量控制 [gap=728]Key words: Multiple deep-layer mixed seep-preventing wall；Thick medium coarse sand bed；Jet air from the middle aiguille；Workmanship；Quality control ..