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。

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Recently, several ten sets of crane, leveller, extrusion press, excavator about 3000t mechanical equipments have been exported to the world - wide more than 20 countries.

近年来，已经有数十台起重机、矫正机、挤压机、挖掘机，约3000多吨机械设备出口到世界20多个国家。

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