在软泥中，可以利用挖掘机，很容易地把需要延伸的管子穿过泥土推下去。
In soft clay, tubes of the extending type can easily be pushed down through the clay by using a mechanical excavator.
在软泥中，可以利用挖掘机，很容易地把需要延伸的管子穿过泥土推下去。
In soft clay, tubes of the extending type can easily be pushed down through the clay by using a mechanical excavator.
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