Head to the nearest gas and oil pipeline project and one of the workhorses dotting the landscape will certainly be a hydraulic excavator. These behemoth machines help with many tasks but many know and use them for their superior trench-digging abilities. "Well if you're on a cross-country pipeline, it basically boils down to about one; just open the ditch," says George Lumpkins, manager of product development at Kobelco.
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