concealed nailing 中文意思是什麼
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Soil nailing walls can ensure the stability of some trenches but the horizontal displacement is too large to satisfy the needs of building or concealed work " s security. how to reduce the displacement of the soil nailing wall system
有的基坑土釘墻支護能保證其穩定性，但水平位移過大，滿足不了基坑周邊既有建築物或隱蔽物的要求，如何改善土釘墻支護結構位移過大的問題
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