| 摘要 |
A hand-held groove cutter, particularly for cutting grooves in concrete structures, comprises a movable carriage having wheels for rolling over the concrete structure, and a fluid-operated percussion hammer mounted on the carrier. The hammer includes a piston and a cylinder which is mounted for sliding movement in a housing, and a tool which is connected to the piston. An adjustment arrangement is operative for moving the cylinder relative to the housing to thereby adjust the stroke of the piston and the depth of stroke of the tool.
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