| 摘要 |
The invention relates to a method for disposing of underground obstacles, such as tree roots, wherein an at least substantially sickle-like knife (2) provided on both sides with a cutting edge (6,7) is attached to an excavator arm of an excavating machine (1), whereafter the knife (2) is moved through the ground. One side (7) of the knife (2) is preferably provided with sawteeth (5), so that obstacles can be sawn through using sawing movements performed by the excavator arm.
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