| 摘要 |
A rock drill with a percussion mechanism which includes a piston (32), a body (12) in which is formed a chamber (14), at least a first cylinder (18) which is located in the chamber and which, on an inner side, forms at least part of a sleeve for the piston (32), and a valve (22), for controlling movement of the piston, which is located on an outer side of the first cylinder (18). Stop means (142) integrally attached to the first cylinder prevents the valve from being removed.
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