| 摘要 |
PROBLEM TO BE SOLVED: To provide a sub-soiler working machine, hardly attaching soil on a knife of the sub-soiler working machine used for performing the crushing of the core of the soil, also reducing the resistance with the soil and further surly performing the discharge and turning over of excavated soil. SOLUTION: This sub-soiler working machine constituted by mounting the knife on the working machine for performing the crushing of the core of the soil constituted by mounting a friction-reducing member made from a plastic at least along the front edge of the knife, and also mounting the friction- reducing member along the front edge of the knife as exchangeable.
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