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Fig. 5 | ROBOMECH Journal

Fig. 5

From: Safe tree felling using expansion agent

Fig. 5

Proposed drilling method A. In proposed drilling method A, two holes are opened in the longitudinal direction of the tree. A cut is made from the surface of the tree to the lower hole. The second cut is made above the upper hole. After the reaction of expansion agent, two holes are connected by a crack. The upper cutstops the crack in order to keep the product part without damage

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