The construction method of large diameter large curvature pushing pipe is first used in China and has been used rarely in other countries.
大口径急曲线顶管工法在我国首次使用，在国际上也很少见。
The construction method of large diameter large curvature pushing pipe is first used in China and has been used rarely in other countries.
大口径急曲线顶管工法在我国首次使用，在国际上也很少见。
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