FIELD: forestry. SUBSTANCE: boom has handle with stop and grips mounted in sequence below handle. One grip is made C-shaped and other grip is L-shaped. Mid portions of grips are pivotally mounted on handle at distance at least equal to C-shaped grip width one relative to another. Grips are interconnected in longitudinal plane of handle through hydraulic cylinder and spring. Stop is rigidly fixed on handle. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 3 dwg
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