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freezing wall
expl.
冻结壁
又称冻结帷幕,曾称冻土墙。用人工制冷技术在预定的井巷围岩中所形成的有一定厚度和强度的冻土帷幕。它是冻结法凿井时维护围岩稳定和隔绝地下水通道的主要临时构筑物
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