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單項(xiàng)選擇題

在盾構(gòu)貫通時，在發(fā)生洞口密封失效情況下，應(yīng)立即（）。

A.增大掘進(jìn)參數(shù)
B.減小掘進(jìn)參數(shù)
C.停止注漿

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