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防止引黄工程土洞的渗漏是个重要问题。南干３＃隧洞的灌浆情况说明，实实在在地搞好灌浆足可以防止渗漏。
It is an important issue to prevent seepage of earth and soil from the Yellow River Diversion Project. Nangan 3 # tunnel grouting shows that really enough grouting enough to prevent leakage.