| 摘要 |
A hydraulic breaker is provided to independently form a sliding surface from assembly unit of control valve and remarkably improve endurable quality. A hydraulic breaker comprises: a cylinder(310) which is comprised to move piston downward when a first room and second room are connected to an inlet(101); and a control valve(400) having valve body to connect or block the second room to the inlet or outlet(102). The valve housing comprises: a valve bush(411) of barrel; and a valve plug having extension part.
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