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PURPOSE : A weeder with an angle regulator is provided to cut grasses at a fixed height on complex topographies such as lands with trees or curved areas by keeping the controllable cutting blade of the weeder away from the surface of the earth at a predetermined interval. CONSTITUTION : A weeder includes : a main body(10); an auxiliary block(20) which is connected to the main body and movable in a predetermined amount; a rotation block(30) connected to the auxiliary block; plural cutters(40) installed on the auxiliary and rotation blocks; a power transmission unit(50) installed between the main body and the auxiliary block and between the auxiliary and rotation blocks, which transfers the engine drive power to the cutting blades; a unit(60) for folding the auxiliary block inward the main body or stretching it outward; a floating unit(70) for rotating the auxiliary block up and down in a predetermined amount; a rotating unit(80) for sliding the rotation block around objects if they touch the rotation block. © KIPO 2007